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?

You can expect 75 shoppers out of 150 to prefer plastic bags. This is calculated by multiplying the total number of shoppers (150) by the probability of selecting a shopper who prefers plastic bags (50%), which is 150 x 0.5 = 75.