Answer:
49 Quarters and 49 Dimes
Explanation:
So there is $17.15 in the machine. Let's start by establishing how many of each coin adds up to about $17.15.
Quarters (worth $0.25): 68.6
Dimes (worth $0.10): 171.5
The secret is mostly just trial and error.
So we can start by using 49 Quarters which gets us to $12.25. Let's also add 49 Dimes which gets us to $17.15.