A professor gives his students 9 essay questions to prepare for an exam. Only 3 of the questions will actually appear on the exa

Question

2 years ago

12

m. How many different exams are possible?

1 answer:

Talja [164] · Answer 1 · 2022-04-01T21:23:30+03:00

4 0

Answer: 84

Step-by-step explanation:

The total number of the questions is 9

Possible question is 3

This is combination

Therefore n=9 and r=3

Combination formula=n! / ((n-r)! r!)

9C3=9! /((9-3)! 3!)

=362880 /(6! 3!)

=362880/4320

=84