A test consists of 10 multiple choice questions, each with five possible answers, one of which is correct. To pass the test a student must get 60% or better on the test. If a student randomly guesses, what is the probability that
The student will pass the test?
A)0.006
B)0.060
C)0.377
D)0.205

Question

Quizplus · Accepted Answer

To pass, the student needs at least 6 correct answers. The probability of guessing one question correctly is 1/5. Using the binomial probability formula, calculate the probability of getting exactly 6, 7, 8, 9, and 10 correct answers and sum them. The result is approximately 0.006.

A Test Consists of 10 Multiple Choice Questions, Each with Five