According to a published study, 1 in every 6 men has been involved in a minor traffic accident. Suppose we have randomly and independently sampled twenty-five men and asked each whether
He has been involved in a minor traffic accident. How many of the 25 men do we expect to have
Never been involved in a minor traffic accident? Round to the nearest whole number.
A)6
B)25
C)21
D)4

Question

Quizplus · Accepted Answer

Given that 1 in every 6 men has been involved in a minor traffic accident, it means 5 out of 6 men have never been involved in one. For 25 men, the expected number never involved in a minor traffic accident is (5/6) * 25 = 20.83, which rounds to 21.

According to a Published Study, 1 in Every 6 Men