SOLUTION: On a true/false exam with 5 questions, if you make only random guesses, find the probability of getting at least one incorrect answer.

Algebra ->  Probability-and-statistics -> SOLUTION: On a true/false exam with 5 questions, if you make only random guesses, find the probability of getting at least one incorrect answer.      Log On


   

Question 1027819: On a true/false exam with 5 questions, if you make only random guesses, find the probability of getting at least one incorrect answer.
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!
The complement of the event of getting at least one incorrect answer is the event of no incorrect answers (or all correct!)
The probability of the latter event is 0.5%5E5+=+0.03125
==> Probability is 1-0.5%5E5+=+0.96875.