Question
Wed April 14, 2010 By: Nikhil Deshmukh

find out

Expert Reply
Wed April 14, 2010

(a)  nPm

First person can take any of n seats, 2nd can take any of remaining seat,

hence number of ways,

n(n-1)(n-2)..(n-m+1)

which can be written as,

n!/(n-m)! = nPm

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