Question

You study for an exam, but due to the fact that you waited too long, you only learn 33% of the material. The exam is all multiple choice, with each question having 4 choices.

a) If you come across a question for which you don't know the answer, what's the probability of getting the answer right?
b) If you come across a question for which you do know the answer, what's the probability of getting it right (hint: don't “over think” this - what does it mean if you know the answer...)?
c) What is the overall probability of getting any question correct?

Answer 1

a) 1/4 or 25% because is one good answer out of 4 possible answers

b) 1 or 100% because is given that you know the answer

c) 33% since that how much you learned