4. There are five multiple choice questions on an exam, each having responses a, b, c, or d. Each question is worth 5 points and only one option per question is correct. Suppose the student guesses the answer to each question,
and his or her guesses from question to question are independent. If the student needs at least 20 points to pass
the test, the probability that the student passes is closest to
O a. 0.0156.
Ob. 0.0146.
Oc. 0.0010.A