Difference between revisions of "2019 AMC 8 Problems/Problem 25"
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==Problem 25== | ==Problem 25== | ||
− | Alice has <math>24</math> apples. In how many ways can she share them with Becky and Chris so that each of the people has at least | + | Alice has <math>24</math> apples. In how many ways can she share them with Becky and Chris so that each of the three people has at least two apples? |
==Solution 1== | ==Solution 1== |
Revision as of 13:33, 20 November 2019
Contents
Problem 25
Alice has apples. In how many ways can she share them with Becky and Chris so that each of the three people has at least two apples?
Solution 1
Using Stars and bars, and removing apples so each person can have , we get the total number of ways, which is , which is equal to . ~~SmileKat32
Solution 2
Let's say you assume that Alice has 2 apples. There are 19 ways to split the rest of the apples with Becky and Chris. If Alice has 3 apples, there are 18 ways to split the rest of the apples with Becky and Chris. If Alice has 4 apples, there are 17 ways to split the rest. So the total number of ways to split 24 apples between the three friends is equal to 19+18+17...……+1=20(19/2)=~heeeeeeheeeeeee
See Also
2019 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 6 |
Followed by Problem 26 | |
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
All AJHSME/AMC 8 Problems and Solutions |
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