A professor gives his students 9 essay questions to prepare for an exam. Only 2 of the questions will actually appear on the exam. How many different exams are possible?

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asked Feb 12, 2021 227k views

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A professor gives his students 9 essay questions to prepare for an exam. Only 2 of the questions will actually appear on the exam. How many different exams are possible?

Mathematics
college

Seasong asked

by Seasong

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Answer:

There are 36 possible exams.

Explanation:

How many ways can you select 2 questions out of 9? 9 choose 2.

(9!)/(2!7!) = 36

Daphnee answered Feb 16, 2021

by Daphnee

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