On a multiple-choice exam for which each question has four possible answers,the probability of guessing the correct answer is p = 1/4.What is the mean of the binomial distribution for the number of correct guesses for a series of 100 questions?
A)5
B)25
C)10
D)50

Question

On a multiple-choice exam for which each question has four possible answers,the probability of guessing the correct answer is p = 1/4.What is the mean of the binomial distribution for the number of correct guesses for a series of 100 questions?​
A)​5
B)​25
C)​10
D)​50

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 probability of success on each trial. Here, n = 100 and p = 1/4, so μ = 100 * (1/4) = 25.

On a Multiple-Choice Exam for Which Each Question Has Four