The probability that an individual is left-handed is 0.12. In a class of 39 students, what is the probability of finding five left-handers?
A)0.186
B)0.128
C)0.000
D)0.12

Question

Quizplus · Accepted Answer

This is a binomial probability problem with n=39 and p=0.12. We want to find the probability of getting exactly 5 left-handers. This can be calculated using the binomial probability formula:

P(X=5) = (39 choose 5) * 0.12^5 * (1-0.12)^(39-5)

Using a calculator, we get P(X=5) = 0.186. Therefore, the probability of finding five left-handers is 0.186. Choice A is the correct answer.

The Probability That an Individual Is Left-Handed Is 0