Posted by **Rachal** on Thursday, February 10, 2011 at 7:28pm.

You can answer any 8 questions from the 12 questions on an exam. In how many different ways can you choose the 8 questions, assuming that the order in which you choose the questions is irrelevant?

- Math -
**Ronaldo**, Thursday, February 10, 2011 at 7:38pm
you must use combination formula.

n!/r!(n-r)!

Sub values

12!/ 4! 8!

! is factorial.

- Math -
**Maphefo**, Sunday, April 17, 2011 at 6:44am
Yes

- Math -
**jennfer**, Monday, November 17, 2014 at 9:31pm
a student answers 75% on a math exam correct. If he answer 60 questions correctly How many questions are on the exam.

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