Convert each of the following decimal as percentage : (i) 0.282 (ii) 1

1.	Convert each of the following decimal as percentage : (i) 0.282 (ii) 1.516. Express the following as the product of its factors: (i) 24ab2c2 (ii) 36 x3y2z 7. Using the identity (a + b)(a – b) = a2 – b2, find the following product. (1+ 3b) (3b -1) 8. Find the mean of the following data. 5.1, 4.8, 4.3, 4.5, 5.1, 4.7, 4.5, 5.2, 5.4 9. Find the mode of the following data. 2, 4, 5, 2, 6, 7, 2, 7, 5,4, 8, 6, 10, 3, 2,
Answer» Answer: 7) (1+3B) (1-3b) a=1. b=3b Using the identity (a + b)(a – b) = a² -b² (1+3b) (1-3b) = (1)²-(3b)² or 1 -9b² 8 ) mean = average 5.1+4.8+4.3+4.5+5.1+4.7+ 4.5+5.2+ 5.4 = 43.6 now we have to devide 43.6/9 becoz there are 9 outcomes 43.6/9 _ = 4.84 9) mode = most occuring first we have to write this in ascending order 2, 2, 2, 2, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 10 in this most FREQUENTLY occuring number is 2 answer 2 hope it helps

Convert each of the following decimal as percentage : (i) 0.282 (ii) 1.516. Express the following as the product of its factors: (i) 24ab2c2 (ii) 36 x3y2z 7. Using the identity (a + b)(a – b) = a2 – b2, find the following product. (1+ 3b) (3b -1) 8. Find the mean of the following data. 5.1, 4.8, 4.3, 4.5, 5.1, 4.7, 4.5, 5.2, 5.4 9. Find the mode of the following data. 2, 4, 5, 2, 6, 7, 2, 7, 5,4, 8, 6, 10, 3, 2,

Answer»

Answer:

(1+3B) (1-3b)

a=1. b=3b

Using the identity (a + b)(a – b) = a² -b²

(1+3b) (1-3b) =

(1)²-(3b)² or 1 -9b²

8 )

mean = average

5.1+4.8+4.3+4.5+5.1+4.7+ 4.5+5.2+ 5.4 = 43.6

now we have to devide 43.6/9

becoz there are 9 outcomes

43.6/9

= 4.84

9) mode = most occuring

first we have to write this in ascending order

2, 2, 2, 2, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 10

in this most FREQUENTLY occuring number is 2

answer 2

hope it helps