Question 1078768: Please show work I don't understand!!!
11! / 4!(11-4)!
Answer is 330
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! Please show work I don't understand!!!
11! / 4!(11-4)!
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n! means n factorial, = n*(n-1)*(n-2)*(n-3)...1
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11! / 4!(11-4)! = 11!/(4!*7!)
= 11*10*9*8*7*6*5*4*3*2*1/(4*3*2*1*7*6*5*4*3*2*1)
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Obviously, all terms from 7 down cancel.
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= 11*10*9*8/(4*3*2*1)
= 7920/24
= 330
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If you have a calculator with a ! button, it will do these
If you don't have a calculator like that, get one.
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