Question

1.Suppose 15% of the population is left-handed. What is the probability of finding 2 left-handers in a class of 30 students?

Select one:

a. 0.0076

b. 0.1514

c. 0.1034

d. 0.0404

2.

A large shipment from a garment factory contains 60% shirts, 35% trousers, and 5% hats. Of 10 items selected at random, what is the probability that at most 2 are hats?

Select one:

a. 0.9138

b. 0.3897

c. 0.9885

d. 0.0746

Answer 1

Question 1

Let A be the event that a person is left-handed.

Then,

Let B be the event that in a class of 30 students there are two left-handers.

Then,

Thus, the correct answer is (c)

Question 2

Let A be the event that a selected garment is a hat. Then,

Let B be the event that at most two selected garments are hats out of 10 selected garments.

Then,

Thus, the correct answer is (c)