1.

An organisation selected 2400 families at random and surveyed them to determine a relationship between the income level and the number of vehicles in a family. The information gathered is listed in the table below: Monthly income (in ₹) Number of vehicles per family 0 1 2 3 or more Less than ₹ 25000 10 160 25 0 ₹ 25000 – ₹ 30000 0 305 27 2 ₹ 30000 – ₹ 35000 1 535 29 1 ₹ 35000 – ₹ 40000 2 469 59 25 ₹ 40000 or more 1 579 82 88 Suppose a family is chosen at random. Find the probability that the family chosen is(i) earning ₹ 25000 – ₹ 30000 per month and owning exactly 2 vehicles.(ii) earning ₹ 40000 or more per month and owning exactly 1 vehicle.(iii) earning less than ₹ 25000 per month and not owning any vehicle.(iv) earning ₹ 35000 – ₹ 40000 per month and owning 2 or more vehicles.(v) owning not more than 1 vehicle.

Answer» An organisation selected 2400 families at random and surveyed them to determine a relationship between the income level and the number of vehicles in a family. The information gathered is listed in the table below:
















































Monthly income

(in ₹)
Number of vehicles per family
0 1 2 3 or more
Less than ₹ 25000 10 160 25 0
₹ 25000 – ₹ 30000 0 305 27 2
₹ 30000 – ₹ 35000 1 535 29 1
₹ 35000 – ₹ 40000 2 469 59 25
₹ 40000 or more 1 579 82 88



Suppose a family is chosen at random. Find the probability that the family chosen is

(i) earning ₹ 25000 – ₹ 30000 per month and owning exactly 2 vehicles.

(ii) earning ₹ 40000 or more per month and owning exactly 1 vehicle.

(iii) earning less than ₹ 25000 per month and not owning any vehicle.

(iv) earning ₹ 35000 – ₹ 40000 per month and owning 2 or more vehicles.

(v) owning not more than 1 vehicle.


Discussion

No Comment Found