If X has a binomial distribution with 20 trials and a mean of 6, then the success probability p is:
A)0.3.
B)0.5.
C)0.75.
D)This cannot be determined without taking a sample.

Question

Quizplus · Accepted Answer

The mean of a binomial distribution is given by the formula μ = np, where n is the number of trials and p is the success probability. Given μ = 6 and n = 20, we can solve for p: 6 = 20p, which gives p = 0.3.

If X Has a Binomial Distribution with 20 Trials and a Mean