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OpenStudy (anonymous):
What is 7P5?
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OpenStudy (anonymous):
It is 2,520. Use your calculator.
OpenStudy (anonymous):
How do i find the answer?
OpenStudy (anonymous):
7 P 5 = 7!/2! = 5040/2 = 2,520 7! = 7 x 6 x 5 x 4 x 3 x 2 x 1 = 5,040 2! = 2 x 1 = 2
OpenStudy (anonymous):
so then 6P6 = 1 ?
OpenStudy (anonymous):
In general, r P n = (r!)/(r-n)!
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OpenStudy (anonymous):
6 P 6 = 6!
OpenStudy (anonymous):
n P n = n! Good to know that.
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