SOLUTION: A coin-operated telephone at a mall requires 40 cents for a local call. It takes quarters, dimes, and nickel and does not give change. How many combinations of coins could be used

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Question 503923: A coin-operated telephone at a mall requires 40 cents for a local call. It takes quarters, dimes, and nickel and does not give change. How many combinations of coins could be used to make a local call?
Answer by oberobic(2304) About Me  (Show Source):
You can put this solution on YOUR website!
Enumeration of the total possibilities
Quarters  Dimes  Nickels  Total Cents  
1 1 1 40
1 0 3 40
0 4 0 40
0 3 2 40
0 2 4 40
0 1 6 40
0 0 8 40