Cookies are sold singly or in packages of 3 or 9. With this packaging, how many ways can you buy 18 cookies?

asked Oct 5, 2018 144k views

5 votes

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3 votes

2 packages of nine
6 packages of 3
One package of nine and 3 packages of 3

Mark Allen answered Oct 8, 2018

8.3k points

7 votes

6 packages of 3
2 packages of 9
1 package of 9 and 3 packages of 3

Lotta answered Oct 11, 2018

by Lotta

7.8k points

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