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Find the number of ways that 10 dollars can be converted into dimes and quarters.

 Dec 3, 2019
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The number of quarters has to be even, because if it was odd, then it wouldn't add up.


We can have 0 Quarters all the way to 40 Quarters.

0/2 = 0, 40/2 = 20

The number of numbers between 0 to 20 is 21.

 

You are very welcome!

:P

 Dec 3, 2019

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