If the probability that the Chicago Bears win the Super Bowl is 1/20 and the probability that the Chicago Cubs win the World Series is 1/7, what is the probability that either the Bears win the Super Bowl or the Cub win the World Series (but not both)?
Choose the correct answer
A) 2/7  B) 3/16  C) 4/25  D) 5/28  E) 6/37
19/20*1/7 + 1/20*6/7 = 25/140 = 5/28   The answer is 5/28.
<result>D</result>
If the probability that the Chicago Bears win the Super Bowl is 1/20 and the probability that the Chicago Cubs win the World Series is 1/7, what is the probability that either the Bears win the Super Bowl or the Cub win the World Series (but not both)?