SOLUTION: i dont know how to do these... Factoral Expressions For example.. 7!/3! 2! Please help thank, Rorogirl716@yahoo.com

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Question 577571: i dont know how to do these...
Factoral Expressions
For example..
7!/3! 2!
Please help
thank,
Rorogirl716@yahoo.com
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
i dont know how to do these...
Factoral Expressions
For example..
7!/3! 2!
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7! is 7 factorial = 7*6*5*4*3*2*1 = 5040
3! = 3*2
2! = 2
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A lot of calculators have a ! button. Get one that has that.
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7!/3! 2! = 5040/(3*2)*2 = 5040/12
= 420