ps 500 test23 # 12

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dunkin77: Master | Next Rank: 500 Posts; Posts: 269; Joined: Sun Apr 01, 2007 5:41 am

by dunkin77 » Tue Apr 17, 2007 10:22 am

Hi,

The answer is C) but could not figure out why. Can anyone explain pls?

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Source: Beat The GMAT — Problem Solving | Tue Apr 17, 2007 10:22 am

Cybermusings: Legendary Member; Posts: 559; Joined: Tue Mar 27, 2007 1:29 am; Thanked: 5 times; Followed by:2 members

by Cybermusings » Tue Apr 17, 2007 11:36 am

This one is fairly simple if you use the unitary method logic....

n books ------ $50

1 book ------- 50/n

Thus n-1 books ------ 50 *(n-1)/n

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