Compute Probabilities of Binomial Experiments
-A history professor decides to give a 10-question true-false quiz. She wants to choose the passing grade such that the probability of passing a student who guesses on every question is less than 0.10. What score should be set as the lowest passing grade
A) 8
B) 6
C) 9
D) 7

Question

Quizplus · Accepted Answer

The probability of guessing correctly on a true-false question is 0.5. For a 10-question quiz, the probability of getting 8 or more correct answers by guessing is less than 0.10.