A Multiple-Choice Exam Offers Five Choices for Each Question

Multiple Choice

A multiple-choice exam offers five choices for each question. Jason just guesses the answers, so he has probability 1/5 of getting any one answer right. One of your math major friends tells you that the assignment of probabilities to the number of questions Jason gets right out of 10 is (rounded to three decimal places) :

What is the expected number of right answers Jason will get if the test has 10 questions?

A) 2.282
B) 2.493
C) 3.5
D) 5
E) Can't tell from the information given.