kimnardelli
kimnardelli
13-07-2017
Mathematics
contestada
7! divided by (7-4)!
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nothanksok
nothanksok
13-07-2017
It would be 7*6*5*4*3*2*1 divided by 3*2*1. So just put that in your calculator/work it out and you'll have your answer.
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altavistard
altavistard
13-07-2017
First, let's write out (7-4)! Simplifying, we get (3)! = 3! = 3*2*1 = 6.
Actually, we can stop work here when we reach 3!
Then the problem consists of 7! / 3!.
7! = 7*6*5*4*3!
Dividing 7! by 3! results in 7*6*5*4 = 42*20 = 840 (answer)
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