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)$\surd$50
D)50

Question

Quizplus · Accepted Answer

The mean of a binomial distribution is given by the formula $ \mu = n \times p $, where $ n $ is the number of trials and $ p $ is the probability of success. Here, $ n = 100 $ and $ p = 1/4 $, so the mean is $ 100 \times 1/4 = 25 $.

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

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