Amy876
What is the value of 7P5?
A.5040
B.2520
C.42
D.21



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Amy876
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please explain not sure what to do

hoblos
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nPr = n!/(nr)!
apply this formula

DHASHNI
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yeah its a permutation prob

hoblos
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7P5 = 7!/(75)! = 7!/2! = ..

Amy876
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ok thanks i got it! :D

mud116
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Do you want an example?

mud116
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oh nm lol

Amy876
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ya i got it but thanks any way ;)

mud116
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no prob :)