Math 1431 – Spring 2003 – Test #3 – Practice
Question 5 Answer
  1. P(good service) = 91/200 = 0.0455.

  2. P(good service | hs diploma) = P(good service and hs diploma) / P(hs diploma) = 61/89.

  3. P(good service | no hs diploma) = P(good service and no hs diploma) / P(no hs diploma) = 30/111 = 10/37.