SOLUTION: A student is asked to answer 7 out of 9 questions on an exam,in how many ways can she select the questions to be answered
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Question 612577: A student is asked to answer 7 out of 9 questions on an exam,in how many ways can she select the questions to be answered
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
You want 9 choose 7:
Where 
is the number of combinations of 
things taken 
at a time and is calculated by !})
IF the order in which she answers the questions does not matter. If it does matter, then take 
out of the denominator.
John
My calculator said it, I believe it, that settles it
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