The table shows the number of championships won by the baseball and softball leagues of three youth baseball divisions organized by age groups. Baseball League (B) Softball League (S)
Ages 7 – 9 (X) 3 7
Ages 10 – 12 (Y) 2 2
Ages 13 – 15 (Z) 1 1
If the winner is in Baseball League, find the probability that the winning team is in either the Ages 10 - 12 division or the Ages 13 - 15 division. Answer in terms of a reduced fraction.

A. P(Y | B) =

B. P(Z | B) =

C. P(Y or Z |B) =