Probability Unit Test

Question

8 of 158 of 15 Items

Question
Suppose the probability of selecting a supermarket shopper who prefers plastic bags instead of paper bags is 50%. Out of 150 shoppers, how many can you expect will prefer plastic bags?(1 point)
Responses

50
50

100
100

70
70

75

Answer 1

The correct answer is 75.

Expected value = (Probability of selecting preference for plastic bags) x (Total number of shoppers)
Expected value = 0.5 x 150
Expected value = 75

Therefore, you can expect 75 shoppers out of 150 to prefer plastic bags.