Solve the problem.
-On a multiple choice test with 12 questions, each question has four possible answers, one of which is correct. For students who guess at all answers, find the mean for the number of correct answers.
A) 9
B) 3
C) 4
D) 6

Question

Quizplus · Accepted Answer

The mean number of correct answers for guessing on a 12-question test, where each question has 4 options and only one correct answer, is calculated as 12 * (1/4) = 3. This is because the probability of guessing any single question correctly is 1/4, and over 12 questions, this averages to 3 correct answers.

Solve the Problem. -On a Multiple Choice Test with 12 Questions, Each Question