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15-07-2017
Mathematics

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Find the number of ways to purchase 5 different kinds of drinks from a selection of 13 drinks.

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15-07-2017

that is 13 choices for first drink
12 choices for 2nd drink
11 choices for 3rd drink
10 choices for the 4th drink
9 choices for the 5th drink

13*12*11*10*9=154440 ways to purchase 5 kinds of drinks

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