SOLUTION: A student is told to work on 7 out of 10 questions on an exam. In how many different ways can he complete the exam?
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Question 668549: A student is told to work on 7 out of 10 questions on an exam. In how many different ways can he complete the exam? Answer by solver91311(24713) (Show Source):
Since it apparently doesn't matter which order he works on the 7 problems he does select, you need the number of Combinations of 10 things taken 7 at a time.
is the number of combinations of things taken at a time and is calculated by
Plug in the numbers and do the arithmetic.
John
My calculator said it, I believe it, that settles it
