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1 January, 18:43

A professor must randomly select 4 students to participate in a mock debate. There are 20 students in his class. In how many different ways can these students be selected, if the order of selection does not matter?

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  1. 1 January, 22:25
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    The equation we used in this problem is the combination of probability. The formula used is "nCr = n! / r! * (n - r) !" where, n is all 20 students and r is the 4 students. Substituting the numbers we get 4845 ways.
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