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In how many ways can I collect a total of 20 dollars from 4 people, if each person can give any number of dollars from 0 to 8?

 Jun 30, 2020
 #1
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My computer says there are 375 ways to get $20 from 4 people.

 Jun 30, 2020
 #2
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Hint:Use complementary

 

Well find all the ways then subtract the ways that you don't want

 Jun 30, 2020

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