SOLUTION: A test consists of 30 problems and students are told to answer any 10 of these questions. In how many different ways can they choose the 10 questions?

SOLUTION: A test consists of 30 problems and students are told to answer any 10 of these questions. In how many different ways can they choose the 10 questions?

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Question 472026: A test consists of 30 problems and students are told to answer any 10 of these questions. In how many different ways can they choose the 10 questions?
Answer by edjones(8007) (Show Source): You can put this solution on YOUR website!
nCr=combination of n things taken r at a time=n!/((n-r)!*r!)
=30!/(20!*10!)
=30045015 ways
.
Ed
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