A true-false test consists of five questions. If you guess the answer to each question, what is the probability of getting all five questions correct?
A) 0%
B) 3.1%
C) 6.2%
D) 100%

Question

Quizplus · Accepted Answer

Since each question has only two possible answers (true or false), the probability of getting each question right by guessing is 1/2 or 50%. The probability of getting all five questions right is (1/2) x (1/2) x (1/2) x (1/2) x (1/2), which equals 1/32 or approximately 3.1%. Therefore, the best choice is B. Choice D is not possible because it implies that guessing always leads to a correct answer, which is not true.

A True-False Test Consists of Five Questions