math

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

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  1. make a list of ways to obtain 60ยข 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

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  2. no

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