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CBSE Class 11-science Answered

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Asked by NikhilD | 14 Apr, 2010, 12:08: PM
Expert Answer

(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

Regards,

Team,

TopperLearning.

Answered by | 14 Apr, 2010, 04:07: PM
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