Question

If nP2 =3 nP5, then value of n is
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Answer 1

Step-by-step explanation:

nP2=3 nP5

nP2=15 nP

nP=15 nP/2

nP=7.5 nP

n=7.5nP/P

n=7.5n

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Answer 2

Answer:

8

n!/(n-6)!=3 n!/(n-5)!

1/(n-6)!=3 1/(n-5)!

1/(n-6)! =3 1/(n-5)(n-6)!

1=3 1/n-5

n-5=3

n=8