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?

Question

50
70
75
100

Answer 1

You can expect that 75 shoppers out of the 150 will prefer plastic bags.

Calculation:
Probability of selecting a shopper who prefers plastic bags = 0.5
Total number of shoppers = 150

Expected number of shoppers who prefer plastic bags = 0.5 * 150 = 75