Math, asked by pratiksha14, 1 year ago

(n+1)P5 =120 find n ?

Answers

Answered by CoolestCat015

1

(n+1) P 5 = 5 ! (n+1) C 5 = 120 (n+1) C5

(n+1) C 5 = 1

We know that 5 c5 = 1

n+ 1 = 5

n = 4

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