Question

25. If (n − 1) P 3 : nP4 =1 :10, find n
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Answer 1

Answer:

n=10

Step-by-step explanation:

n-1 p3 = (n-1)!/(n-4)! ____A

np 4 = n!/(n-4)! ____B

A (n-1)! 1 1

__ = ____ = ___ = __

B n! n 10

n=10