PS5

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Source: — Problem Solving |

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by vivek.kapoor83 » Wed Oct 01, 2008 12:28 am
5c2*nc2=150
nc2=15
n! / n-2! = 30
Puttin the value of 'n' from answer and 1st option
6! /4! = 30
So, IMO A
OA pls

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by stubbornp » Wed Oct 01, 2008 1:06 am
:) oa A