The probability that a house in an urban area will develop a leak is 5%. If 20 houses are randomly selected,what is the mean of the number of houses that developed leaks?
A) 1
B) 2
C) 0.5
D) 1.5

Question

Quizplus · Accepted Answer

The mean of a binomial distribution is calculated as n * p, where n is the number of trials (houses) and p is the probability of success (developing a leak). Here, n = 20 and p = 0.05, so the mean is 20 * 0.05 = 1.

The Probability That a House in an Urban Area Will