Of the members of a Boy Scout troop, 15% have received the first aid merit badge. If 40 boy scouts are selected at random, find the probability that four or more will have the first aid merit badge?
A) 86.6%
B) 81.3%
C) 36.6%
D) 31.3%

Question

Quizplus · Accepted Answer

This is a binomial probability problem where n = 40, p = 0.15, and we want P(X ≥ 4). Using the binomial distribution formula or a calculator, the probability is approximately 86.6%.

Of the Members of a Boy Scout Troop, 15% Have