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January 20th, 2016, 03:38 AM   #1
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questions on a test

A student must answer 7 out of 10 questions on a test.

A) how many ways does she have to do this?

B) how many ways does she have if she must answer the first two?

My attempt:

A) 10C7 = 120 different ways

B) 8C5 = 56 different ways

Am I correct? Thanks.
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January 20th, 2016, 04:29 AM   #2
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Looks OK to me (subject to Country Boy's usual question).
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