Question

(1) A student writes a five question multiple-choice quiz. Each question has four possible responses. The student guesses at random for each question. Find the probability that the student has only one correct answer. A. 0.40 B. 0.53 C. 0.25 D. 0.20

Answer 1

(D) 0.20

Explanation:

There are 5 questions in the quiz.

Each question has 4 options to pick from

The student guesses at random for each (and every) question.

Find the probability that the student has only 1 correct answer.

- Focusing less on the "4" options and more on the "5" questions in the quiz, the probability that the student has only 1 correct answer out of 5 is

1/5 = 0.20