24740 + Interview Questions in Mathematics Page 92 InterviewSolution

4551.	Identify the figure in which all the points could be collinear.
Answer» Identify the figure in which all the points could be collinear.

Discussion

4552.	Point (3,-2) lies in ___ Quadrant.
Answer» Point (3,-2) lies in ___ Quadrant.

Discussion

4553.	There are 50 students in a class and the average mark scored by the class in Maths is 65 out of 100. The total marks scored by all the students except Karan and Arjun is 3080. If the marks scored by Karan & Arjun are same, what is the marks scored by Arjun?
Answer» There are 50 students in a class and the average mark scored by the class in Maths is 65 out of 100. The total marks scored by all the students except Karan and Arjun is 3080. If the marks scored by Karan & Arjun are same, what is the marks scored by Arjun?

Discussion

4554.	In the given figure?a) is AC + CB = AB?b) is AB + AC = CB?c) is AB + BC = CA?
Answer» In the given figure? a) is AC + CB = AB? b) is AB + AC = CB? c) is AB + BC = CA?

4554.

In the given figure?a) is AC + CB = AB?b) is AB + AC = CB?c) is AB + BC = CA?

Answer»

In the given figure?

a) is AC + CB = AB?

b) is AB + AC = CB?

c) is AB + BC = CA?

Discussion

4555.	Question 01 A rational number is defined as a number that can be expressed in the form pq, where p and q are integers and (a) q = 0 (b) q = 1 (c) q ≠ 1 (d) q ≠ 0
Answer» Question 01 A rational number is defined as a number that can be expressed in the form $\frac{p}{q}$ , where p and q are integers and (a) q = 0 (b) q = 1 (c) q $\neq$ 1 (d) q $\neq$ 0

4555.

Question 01 A rational number is defined as a number that can be expressed in the form pq, where p and q are integers and (a) q = 0 (b) q = 1 (c) q ≠ 1 (d) q ≠ 0

Answer»

Question 01

A rational number is defined as a number that can be expressed in the form $\frac{p}{q}$ , where p and q are integers and

(a) q = 0

(b) q = 1

(c) q $\neq$ 1

(d) q $\neq$ 0

Discussion

4556.	A commenced business on 1st April, 2017 with a capital of ₹ 10,000. He immediately bought Furniture and Fixtures for ₹ 2,000. On 1st October, 2017, he borrowed ₹ 5,000 from his wife 9% p.a. (interest not yet paid) and introduced a further capital of his own amounting to ₹ 1,500. A drew ₹ 300 per month at the end of each month for household expenses. On 31st March, 2018 his position was as follows:Cash in Hand ₹ 2,800; Sundry Debtors ₹ 4,800; Stock ₹ 6,800; Bills Receivable ₹ 1,600; Sundry Creditors ₹ 500 and owing for Rent ₹ 150. Furniture and Fixtures to be depreciated by 10%. Ascertain the profit or loss made by A during 2017–18.
Answer» A commenced business on 1st April, 2017 with a capital of ₹ 10,000. He immediately bought Furniture and Fixtures for ₹ 2,000. On 1st October, 2017, he borrowed ₹ 5,000 from his wife 9% p.a. (interest not yet paid) and introduced a further capital of his own amounting to ₹ 1,500. A drew ₹ 300 per month at the end of each month for household expenses. On 31st March, 2018 his position was as follows: Cash in Hand ₹ 2,800; Sundry Debtors ₹ 4,800; Stock ₹ 6,800; Bills Receivable ₹ 1,600; Sundry Creditors ₹ 500 and owing for Rent ₹ 150. Furniture and Fixtures to be depreciated by 10%. Ascertain the profit or loss made by A during 2017–18.

Discussion

4557.	10 Find the approximate value of sin (5/16)
Answer» 10 Find the approximate value of sin (5/16)

Discussion

4558.	The distance between the points A (2, -5) and B(7, 7) is ______units
Answer» The distance between the points A (2, -5) and B(7, 7) is ______units

Discussion

4559.	If the radius of a cone is 5 cm and its height is 12 cm, then its slant height (L) is ____ cm.
Answer» If the radius of a cone is 5 cm and its height is 12 cm, then its slant height (L) is ____ cm.

Discussion

4560.	If ∣∣∣∣2a x1 y12b x2 y22c x3 y3∣∣∣∣=abc2≠0, then the area of the triangle whose vertices are(x1a,y1a),(x2b,y2b),(x3c,y3c) is
Answer» If $∣ ∣∣ ∣ \begin{matrix} 2 a x_{1} y_{1} 2 b x_{2} y_{2} 2 c x_{3} y_{3} \end{matrix} ∣ ∣∣ ∣ = \frac{a b c}{2} \neq 0$ , then the area of the triangle whose vertices are $(\frac{x_{1}}{a}, \frac{y_{1}}{a}), (\frac{x_{2}}{b}, \frac{y_{2}}{b}), (\frac{x_{3}}{c}, \frac{y_{3}}{c})$ is

Discussion

4561.	Two sides of a triangle are of length 4 cm and 2.5 cm. The length of the third side of the triangle cannot be(a) 6 cm(b) 6.5 cm(c) 5.5 cm(d) 6.3 cn
Answer» Two sides of a triangle are of length 4 cm and 2.5 cm. The length of the third side of the triangle cannot be (a) 6 cm (b) 6.5 cm (c) 5.5 cm (d) 6.3 cn

Discussion

4562.	The opposite angles of a parallelogram are ______________ .
Answer» The opposite angles of a parallelogram are ______________ .

Discussion

4563.	Match the polynomials with their respective factors.
Answer» Match the polynomials with their respective factors.

Discussion

4564.	In parallelogram ABCD, O is any point on diagonal AC. Prove that ar(OBC)=ar(OCD).
Answer» In parallelogram ABCD, O is any point on diagonal AC. Prove that ar(OBC)=ar(OCD).

Discussion

4565.	We know that Probability of an event E, written as P(E) =Number of outcomes favourable to E (m)Number of all possible outcomes of the experiment (n). Which of the following options correctly explains the relationship between m and n?
Answer» We know that Probability of an event E, written as P(E) $= \frac{N u m b e r o f o u t c o m e s f a v o u r a b l e t o E (m)}{N u m b e r o f a l l p o s s i b l e o u t c o m e s o f t h e e x p e r i m e n t (n)}$ . Which of the following options correctly explains the relationship between m and n?

Discussion

4566.	In the given figure, O is the centre of the circle. If ∠PQR=130∘ , then the measure of ∠RPT is
Answer» In the given figure, O is the centre of the circle. If $∠ P Q R = 130^{\circ}$ , then the measure of $∠ R P T$ is

Discussion

4567.	Construct ΔXYZ, if its perimeter is 14 cm, one side XY of length 5 cm and ∠X= 45°.
Answer» Construct ΔXYZ, if its perimeter is 14 cm, one side XY of length 5 cm and ∠X= 45°.

Discussion

4568.	From Sam's home, the route from home to the airport is marked in the map shown below. State whether the marking of the route forms a closed shape or not?
Answer» From Sam's home, the route from home to the airport is marked in the map shown below. State whether the marking of the route forms a closed shape or not?

Discussion

4569.	Integrate cox/(sinx)^2/3+(sinx)^3/4
Answer» Integrate cox/(sinx)^2/3+(sinx)^3/4

Discussion

4570.

The production of saleable steel in some of the steel plants our country during 1999 is given below: Plant Bhilai Durgapur Rourkela Bokaro Production (In thousand tonnes) 160 80 200 150 Construct a bar graph to represent the above data on a graph paper by using the scale 1 big divisions = 20 thousand tonnes.

Answer» The production of saleable steel in some of the steel plants our country during 1999 is given below:

Plant	Bhilai	Durgapur	Rourkela	Bokaro
Production (In thousand tonnes)	160	80	200	150

Construct a bar graph to represent the above data on a graph paper by using the scale 1 big divisions = 20 thousand tonnes.

Discussion

4571.	The base radii of two right circular cones of the same height are in the ratio 3 : 5. The ratio of their volumes is
Answer» The base radii of two right circular cones of the same height are in the ratio 3 : 5. The ratio of their volumes is

Discussion

4572.	The base of a conical tent is of area 616 sq.cm. A 48 cm long vertical pole is placed at its centre so that it touches the roof of the tent. How much canvas is needed to make the tent if the base is also covered with canvas?
Answer» The base of a conical tent is of area 616 sq.cm. A 48 cm long vertical pole is placed at its centre so that it touches the roof of the tent. How much canvas is needed to make the tent if the base is also covered with canvas?

Discussion

4573.

Question 1 (iv) Which of the drawings (a) to (d) show: 3×14 a) b) c) d)

Answer»

Question 1 (iv)

Which of the drawings (a) to (d) show:
$3 \times \frac{1}{4}$
a)

b)

c)

d)

Discussion

4574.	The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor, if the cost per m2 is Rs. 4.
Answer» The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor, if the cost per $m^{2}$ is Rs. 4.

Discussion

4575.	Two unbiased coins are tossed simultaneously. The probability of getting at most one head is
Answer» Two unbiased coins are tossed simultaneously. The probability of getting at most one head is

Discussion

4576.	Find the value of log7log7 √7(√7√7) , if log10 7 = 0.8450 and log10 2 = 0.3010
Answer» Find the value of ${log}_{7} {log}_{7}$ $\sqrt{7 (\sqrt{7 \sqrt{7}})}$ , if ${log}_{10}$ 7 = 0.8450 and ${log}_{10}$ 2 = 0.3010

Discussion

4577.	how to improve mathematics
Answer» how to improve mathematics

Discussion

4578.	Question 20The mean of 25 observation is 36. Out of these observations, if the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is:A) 23B) 36C) 38D) 40
Answer» Question 20 The mean of 25 observation is 36. Out of these observations, if the mean of first 13 observations is 32 and that of the last 13 observations is 40, the $13^{t h}$ observation is: A) 23 B) 36 C) 38 D) 40

Discussion

4579.	The mode of the following data is 23, 25, 28, 25, 18, 21, 22, 25, 21
Answer» The mode of the following data is 23, 25, 28, 25, 18, 21, 22, 25, 21

4579.

The mode of the following data is 23, 25, 28, 25, 18, 21, 22, 25, 21

Answer»

The mode of the following data is

23, 25, 28, 25, 18, 21, 22, 25, 21

Discussion

4580.	Simplify x4 x3 x2x345.
Answer» Simplify $\sqrt[5]{x^{4} \sqrt[4]{x^{3} \sqrt[3]{x^{2} \sqrt{x}}}} .$

Discussion

4581.	A thin metal disc of surface area 500 cm2 at 0 °C is heated to 40 °C. Find the increase in the surface area of the disc.(σ = 4 × 10-5 °C -1)
Answer» A thin metal disc of surface area 500 cm2 at 0 °C is heated to 40 °C. Find the increase in the surface area of the disc. (σ = 4 × 10^-5 °C ^-1)

Discussion

4582.	f(x) = x3 − 6x2 + 2x − 4, g(x) = 1 − 2x
Answer» f(x) = x³ − 6x² + 2x − 4, g(x) = 1 − 2x

Discussion

4583.	Find the area of the shaded pathway.
Answer» Find the area of the shaded pathway.

4583.

Find the area of the shaded pathway.

Answer»

Find the area of the shaded pathway.

Discussion

4584.	Who is the author of the patriotic song "Sare Jahan se Achcha"?
Answer» Who is the author of the patriotic song "Sare Jahan se Achcha"?

Discussion

4585.	If log xb−c=log yc−a=log za−b then xa.yb.zc=
Answer» If $\frac{l o g x}{b - c} = \frac{l o g y}{c - a} = \frac{l o g z}{a - b}$ then $x^{a} . y^{b} . z^{c} =$

Discussion

4586.	The polynomial bx3+3x2-3 and 2x3-5x+b when divided by (x-4) leaves the remainders R1 and R2 respectively. Find the value of b if 2R1-R2=0
Answer» The polynomial bx³+3x²-3 and 2x³-5x+b when divided by (x-4) leaves the remainders R₁ and R₂ respectively. Find the value of b if 2R₁-R₂=0

Discussion

4587.	If x^2=0.4, then find the value of x:-(a)0.2(b)-0.2(c)√10/5(d)5/√10
Answer» If x^2=0.4, then find the value of x:- (a)0.2 (b)-0.2 (c)√10/5 (d)5/√10

Discussion

4588.	Find a rational and an irrational number between 2 aand 3.How many rational and irrational numbers are there between 2 and 3
Answer» Find a rational and an irrational number between 2 aand 3.How many rational and irrational numbers are there between 2 and 3

Discussion

4589.	ABCD is a quadrilateral with −−→AB=→a,−−→AD=→b,−−→AC=2→a+3→b. If the area of the quadrilateral is p times the area of parallelogram with AB and AD as adjacent side, then value of p is
Answer» $A B C D$ is a quadrilateral with $- - \to A B = \to a, - - \to A D = \to b, - - \to A C = 2 \to a + 3 \to b$ . If the area of the quadrilateral is $p$ times the area of parallelogram with $A B$ and $A D$ as adjacent side, then value of $p$ is

Discussion

4590.	Find the cost of painting 15 cylindrical pillars of a building at Rs. 2.50 per square metre if the diameter and height of each pillar are 48 cm and 7 metres respectively.
Answer» Find the cost of painting $15$ cylindrical pillars of a building at $R s . 2.50$ per square metre if the diameter and height of each pillar are $48 c m$ and $7$ metres respectively.

Discussion

4591.	A tangent at a point A on the circle meets a line through the centre of the circle at a point B so that OB=13 cm and AB=12 cm. Find the radius of the circle.
Answer» A tangent at a point $A$ on the circle meets a line through the centre of the circle at a point $B$ so that $O B = 13 c m$ and $A B = 12 c m$ . Find the radius of the circle.

4591.

A tangent at a point A on the circle meets a line through the centre of the circle at a point B so that OB=13 cm and AB=12 cm. Find the radius of the circle.

Answer»

A tangent at a point $A$ on the circle meets a line through the centre of the circle at a point $B$ so that $O B = 13 c m$ and $A B = 12 c m$ . Find the radius of the circle.

Discussion

4592.	Determine which of the following polynomial has x – 2 a factor:(i) 3x2+6x−24(ii) 4x2+x–2
Answer» Determine which of the following polynomial has x – 2 a factor: (i) $3 x^{2} + 6 x - 24$ (ii) $4 x^{2} + x - 2$

Discussion

4593.	The plane parallel to yz-plane is perpendicular to ____________________.
Answer» The plane parallel to yz-plane is perpendicular to ____________________.

Discussion

4594.	The area of \|\|gm ABCD is (a) AB×BM (b) BC×BN (c) DC×DL (d) AD×DL
Answer» The area of \|\|gm ABCD is (a) $A B \times B M$ (b) $B C \times B N$ (c) $D C \times D L$ (d) $A D \times D L$

4594.

The area of ||gm ABCD is (a) AB×BM (b) BC×BN (c) DC×DL (d) AD×DL

Answer»

The area of ||gm ABCD is

(a) $A B \times B M$

(b) $B C \times B N$

(c) $D C \times D L$

(d) $A D \times D L$

Discussion

4595.	Give possible expressions for the length and breadth of each of thefollowing rectangles, in which their areas are given:
Answer» Give possible expressions for the length and breadth of each of thefollowing rectangles, in which their areas are given:

4595.

Give possible expressions for the length and breadth of each of thefollowing rectangles, in which their areas are given:

Answer»

Give possible expressions for the length and breadth of each of thefollowing rectangles, in which their areas are given:

Discussion

4596.

Kuldeep, a general merchant, keeps his accounts on Single Entry System. He wants to know the results of his business on 31st March, 2019 and for that following information is available: 1st April, 2018 (₹) 31st March, 2019 (₹) Cash in Hand 1,50,000 1,75,000 Bank Balance 7,50,000 8,00,000 Furniture 1,00,000 1,00,000 Stock 5,00,000 6,50,000 Creditors 3,50,000 4,00,000 Debtors 2,50,000 3,00,000 During the year, he had withdrawn ₹ 5,00,000 for his personal use and invested ₹ 2,50,000 as additional capital. Calculate his profits on 31st March, 2019 and prepare the Statement of Affairs as on that date.

Answer» Kuldeep, a general merchant, keeps his accounts on Single Entry System. He wants to know the results of his business on 31st March, 2019 and for that following information is available:

	1st April, 2018 (₹)	31st March, 2019 (₹)
Cash in Hand	1,50,000	1,75,000
Bank Balance	7,50,000	8,00,000
Furniture	1,00,000	1,00,000
Stock	5,00,000	6,50,000
Creditors	3,50,000	4,00,000
Debtors	2,50,000	3,00,000

During the year, he had withdrawn ₹ 5,00,000 for his personal use and invested ₹ 2,50,000 as additional capital. Calculate his profits on 31st March, 2019 and prepare the Statement of Affairs as on that date.

Discussion

4597.	Consider the following statements regarding GST Bill and choose the correct statements:- Code:
Answer» Consider the following statements regarding GST Bill and choose the correct statements:- Code:

4597.

Consider the following statements regarding GST Bill and choose the correct statements:- Code:

Answer»

Consider the following statements regarding GST Bill and choose the correct statements:-

Code:

Discussion

4598.	From the following balances, prepare Final Accounts of M/s Mangal & Sons for the year ended 31st March, 2019:Opening Stock ₹ 12,500; Bills Receivable ₹ 2,000; Sales ₹ 70,000; Purchases ₹ 37,500; Creditors ₹ 20,000; Salaries ₹ 3,850; Insurance ₹ 200; Debtors ₹ 32,500; Carriage ₹ 1,450; Commission ₹ 750; Interest ₹ 900; Printing ₹ 250; Bills Payable ₹ 3,150; Returns In ₹ 1,300; Returns Out ₹ 500; Bank ₹ 5,250; Rent and Taxes ₹ 1,300; Furniture ₹ 1,000; Capital ₹ 7,100; Stock on 31st March, 2019 ₹ 15,000.
Answer» From the following balances, prepare Final Accounts of M/s Mangal & Sons for the year ended 31st March, 2019: Opening Stock ₹ 12,500; Bills Receivable ₹ 2,000; Sales ₹ 70,000; Purchases ₹ 37,500; Creditors ₹ 20,000; Salaries ₹ 3,850; Insurance ₹ 200; Debtors ₹ 32,500; Carriage ₹ 1,450; Commission ₹ 750; Interest ₹ 900; Printing ₹ 250; Bills Payable ₹ 3,150; Returns In ₹ 1,300; Returns Out ₹ 500; Bank ₹ 5,250; Rent and Taxes ₹ 1,300; Furniture ₹ 1,000; Capital ₹ 7,100; Stock on 31st March, 2019 ₹ 15,000.

Discussion

4599.

In the given figure, ABQP and ABCD are two parallelograms on the same base AB. Area of parallelogram ABCDArea of triangle PAB is equal to: __

Answer»

In the given figure, ABQP and ABCD are two parallelograms on the same base AB. $\frac{A r e a o f p a r a l l e l o g r a m A B C D}{A r e a o f t r i a n g l e P A B}$ is equal to:

__

Discussion

4600.

A person recorded the speed (in km/hr) of 10 motorists as 48, 52, 57, 55, 45, 39, 61, 49, 51 and 43. What is the average speed of these motorists?

Answer»

A person recorded the speed (in km/hr) of 10 motorists as 48, 52, 57, 55, 45, 39, 61, 49, 51 and 43.

What is the average speed of these motorists?

Discussion

Explore topic-wise InterviewSolutions in .

Identify the figure in which all the points could be collinear.

Point (3,-2) lies in ___ Quadrant.

There are 50 students in a class and the average mark scored by the class in Maths is 65 out of 100. The total marks scored by all the students except Karan and Arjun is 3080. If the marks scored by Karan &amp; Arjun are same, what is the marks scored by Arjun?

In the given figure?a) is AC + CB = AB?b) is AB + AC = CB?c) is AB + BC = CA?

Question 01 A rational number is defined as a number that can be expressed in the form pq, where p and q are integers and (a) q = 0 (b) q = 1 (c) q ≠ 1 (d) q ≠ 0

10 Find the approximate value of sin (5/16)

The distance between the points A (2, -5) and B(7, 7) is ______units

If the radius of a cone is 5 cm and its height is 12 cm, then its slant height (L) is ____ cm.

If ∣∣∣∣2a x1 y12b x2 y22c x3 y3∣∣∣∣=abc2≠0, then the area of the triangle whose vertices are(x1a,y1a),(x2b,y2b),(x3c,y3c) is

Two sides of a triangle are of length 4 cm and 2.5 cm. The length of the third side of the triangle cannot be(a) 6 cm(b) 6.5 cm(c) 5.5 cm(d) 6.3 cn

The opposite angles of a parallelogram are ______________ .

Match the polynomials with their respective factors.

In parallelogram ABCD, O is any point on diagonal AC. Prove that ar(OBC)=ar(OCD).

We know that Probability of an event E, written as P(E) =Number of outcomes favourable to E (m)Number of all possible outcomes of the experiment (n). Which of the following options correctly explains the relationship between m and n?

In the given figure, O is the centre of the circle. If ∠PQR=130∘ , then the measure of ∠RPT is

Construct ΔXYZ, if its perimeter is 14 cm, one side XY of length 5 cm and ∠X= 45°.

From Sam's home, the route from home to the airport is marked in the map shown below. State whether the marking of the route forms a closed shape or not?

Integrate cox/(sinx)^2/3+(sinx)^3/4

The base radii of two right circular cones of the same height are in the ratio 3 : 5. The ratio of their volumes is

The base of a conical tent is of area 616 sq.cm. A 48 cm long vertical pole is placed at its centre so that it touches the roof of the tent. How much canvas is needed to make the tent if the base is also covered with canvas?

Question 1 (iv) Which of the drawings (a) to (d) show: 3×14 a) b) c) d)

The floor of a building consists of 3000 tiles which are rhombus shaped and each of its diagonals are 45 cm and 30 cm in length. Find the total cost of polishing the floor, if the cost per m2 is Rs. 4.

Two unbiased coins are tossed simultaneously. The probability of getting at most one head is

Find the value of log7log7 √7(√7√7) , if log10 7 = 0.8450 and log10 2 = 0.3010

how to improve mathematics

Question 20The mean of 25 observation is 36. Out of these observations, if the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is:A) 23B) 36C) 38D) ​​​​​​​40

The mode of the following data is 23, 25, 28, 25, 18, 21, 22, 25, 21

Simplify x4 x3 x2x345.

A thin metal disc of surface area 500 cm2 at 0 °C is heated to 40 °C. Find the increase in the surface area of the disc.(σ = 4 × 10-5 °C -1)

f(x) = x3 − 6x2 + 2x − 4, g(x) = 1 − 2x

Find the area of the shaded pathway.

Who is the author of the patriotic song "Sare Jahan se Achcha"?

If log xb−c=log yc−a=log za−b then xa.yb.zc=

The polynomial bx3+3x2-3 and 2x3-5x+b when divided by (x-4) leaves the remainders R1 and R2 respectively. Find the value of b if 2R1-R2=0

If x^2=0.4, then find the value of x:-(a)0.2(b)-0.2(c)√10/5(d)5/√10

Find a rational and an irrational number between 2 aand 3.How many rational and irrational numbers are there between 2 and 3

ABCD is a quadrilateral with −−→AB=→a,−−→AD=→b,−−→AC=2→a+3→b. If the area of the quadrilateral is p times the area of parallelogram with AB and AD as adjacent side, then value of p is

Find the cost of painting 15 cylindrical pillars of a building at Rs. 2.50 per square metre if the diameter and height of each pillar are 48 cm and 7 metres respectively.

A tangent at a point A on the circle meets a line through the centre of the circle at a point B so that OB=13 cm and AB=12 cm. Find the radius of the circle.

Determine which of the following polynomial has x – 2 a factor:(i) 3x2+6x−24(ii) 4x2+x–2

The plane parallel to yz-plane is perpendicular to ____________________.

The area of ||gm ABCD is (a) AB×BM (b) BC×BN (c) DC×DL (d) AD×DL

Give possible expressions for the length and breadth of each of thefollowing rectangles, in which their areas are given:

Consider the following statements regarding GST Bill and choose the correct statements:- Code:

In the given figure, ABQP and ABCD are two parallelograms on the same base AB. Area of parallelogram ABCDArea of triangle PAB is equal to: __

A person recorded the speed (in km/hr) of 10 motorists as 48, 52, 57, 55, 45, 39, 61, 49, 51 and 43. What is the average speed of these motorists?

There are 50 students in a class and the average mark scored by the class in Maths is 65 out of 100. The total marks scored by all the students except Karan and Arjun is 3080. If the marks scored by Karan & Arjun are same, what is the marks scored by Arjun?

Question 20The mean of 25 observation is 36. Out of these observations, if the mean of first 13 observations is 32 and that of the last 13 observations is 40, the 13th observation is:A) 23B) 36C) 38D) 40