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In how many ways can a cashier give change of exactly 60 cents if he has the following coins available?

10 quarters; 10 dimes; 10 nickels

2 answers

make a list of ways to obtain 60¢ starting with the largest coins
2Q, 1D
2Q 2N
1Q 3D 1N
1Q 2D 3N
1Q 5N
6D
5D 2N
4D 4N
3D 6N
2D 8N
1D 10N

no

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