Question

A multiple choice test has 12 questions each of which has 5 possible answers, only one of which is correct. If Judy, who forgot to study for the test, guesses on all questions, what is the probability that she will answer

a) exactly 3 questions correctly?
b) all the questions incorrectly?
c) at least 5 questions correct?
d) at most 4 questions incorrect?

Answer 1

Not exactly sure but maybe these percentages that i found can help you

Explanation:

if there are 12 questions then there are 12 correct answers out of 60 total answers 12 divided by 60 = 0.20 which is 20 percent so upon guessing she has a theoretical 20 percent chance to get all questions correct