Answer: There are 11 sports cards in each group.
Explanation:
Given: The number of football cards Mae has = 15
The number of baseball cards Mae has = 18
Since, She separated them into 3 equal groups.
Therefore, The number of football cards each group has =

The number of baseball cards each group has =

The number of sports cards in each group = 5+6=11
Hence, there are 11 sports cards in each group.