Asked by | 30th Nov, 2009, 06:27: PM
We have not understood the query that you have posted. We would request you to clarify the II term in RHS
nPr = (n-1)Pr + r(n-1)Pr ?
Is this r X (n-1)Pr or r(n-1)Pr
so that we may answer this to the best of the ability.
Answered by | 4th Dec, 2009, 04:07: PM
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