Professor Dupré Calc gives her class 20 study questions, from which she will select 8 to be on the final exam. How many ways can she select the questions?

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asked Dec 6, 2018 33.3k views

4 votes

Professor Dupré Calc gives her class 20 study questions, from which she will select 8 to be on the final exam. How many ways can she select the questions?

Mathematics
high-school

Talha Tanveer asked

by Talha Tanveer

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1 Answer

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Since order doesn't matter, then it's a combination of 8 chosen among 20:

20C₈ = (20!)/(20-8)!(8!) = 125,970 ways

Yahs Hef answered Dec 11, 2018

by Yahs Hef

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