Answer: he has 15 more basketball cards than baseball cards.
Step-by-step explanation:
The total number of sport trading cards that Gerry has is 50.
Of those cards, 1/5 of them are baseball cards. This means that the number of baseball cards that he has is
1/5 × 50 = 10
1/10 of them are football cards. This means that the number of football cards that he has is
1/10 × 50 = 5
If the rest are basketball cards, it means that the number of basketball cards that he has is
50 - (10 + 15) = 50 - 25 = 25
Therefore, the number if basketball cards that he has more than baseball cards is
25 - 10 = 15
