Question

Please ! check my answer.
A certain game has two stacks of 30 tiles with pictures on them. In
the first stack of tiles, there are 10 dogs, 4 cats, 5 balls, and 11 horses. In the
second stack of tiles, there are 3 flowers, 8 fish, 12 balls, 2 cats, and 5 horses. The top tile in each stack is chosen. Find each probability.

Answer 1

1) P (each a ball): First stack 5 balls, second 12 balls
(5/30)*(12/30)
2) P (exactly one is a ball):
5/30=1/6