Problem 2

In how many ways can four math books be selected from 18 math books if the order doesn't matter?


Check out the set: Combinatorics .
432 72 73440 3060

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1 solution

Ashish Menon
Sep 1, 2016

The answer is 18 C 4 = 3060 ^{18} C_{4} = \boxed{3060} .

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