- in npr=n(n-1)(n-2).................(n-r+1)
a) n b)r-1 c)n-r d)r
1 Replies
intermediate(ipc)course
(no)
(1460 Points)
Replied 16 May 2012
ans. c
n!/n-r! = n!
therefore, n-r! = 1
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