PS5

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stubbornp: Master | Next Rank: 500 Posts; Posts: 496; Joined: Sun May 04, 2008 11:01 pm; Location: mumbai; Thanked: 7 times; GMAT Score:640

by stubbornp » Wed Oct 01, 2008 12:23 am

PS5

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Source: Beat The GMAT — Problem Solving | Wed Oct 01, 2008 12:23 am

vivek.kapoor83: Legendary Member; Posts: 833; Joined: Mon Aug 04, 2008 1:56 am; Thanked: 13 times

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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stubbornp: Master | Next Rank: 500 Posts; Posts: 496; Joined: Sun May 04, 2008 11:01 pm; Location: mumbai; Thanked: 7 times; GMAT Score:640

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

oa A

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