SOLUTION: there are ten questions on a test. the instruction says that only seven of the questions are to be answered. how many ways can the seven to be answered be selected?
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Question 696777: there are ten questions on a test. the instruction says that only seven of the questions are to be answered. how many ways can the seven to be answered be selected? Answer by Afolabyte(4) (Show Source):
You can put this solution on YOUR website! Total no of questions=10
no required 2 b answered=7
by 4mula we have
n!/(n-r)!
10P7=10!/10-7)!
=10!/3!
=10*9*8*7*6*5*4
=604800.
Hope it works.
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