Answer:
31 toys
Explanation:
What we know:
- There are 57 toys in total
- 15 are new
- 9 are Ben's favourite
- 2 are both Ben's favourite and new
Ben is not going to give away toys that are new or favourite. This means that the number of toys he will not give away is equal to 15+9+2.
15+9+2
= 26 toys
He has 57 toys in total, so we can find the number of toys he is going to give away by subtracting 26 from 57.
57-26
= 31 toys
Therefore, he will give away 31 toys.
I hope this helps!