PS 2

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vaivish: Master | Next Rank: 500 Posts; Posts: 371; Joined: Tue Apr 29, 2008 10:16 amFollowed by: 1 member; Thanked: 6 times

by vaivish » Fri Aug 01, 2008 2:11 am

There are 5 cars in a car dealer and 5 keys. The sales person doesn't know which key is for which car. If assign 5 keys to each car, which one below is impossible as the number of cars that will have the right key?

(A) 0
(B) 2
(C) 3
(D) 4
(E) 5

Oa is D

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Source: Beat The GMAT — Problem Solving | Fri Aug 01, 2008 2:11 am

pepeprepa: Legendary Member; Posts: 661; Joined: Tue Jul 08, 2008 12:58 pm; Location: France; Thanked: 48 times

by pepeprepa » Fri Aug 01, 2008 2:19 am

If 4 cars have their right key, it remains 1 key and 1 car. The key remaining is for the remaining car. In this situation 5 cars have the right key, so 4 is impossible.

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raunekk: Legendary Member; Posts: 1159; Joined: Wed Apr 16, 2008 10:35 pm; Thanked: 56 times

by raunekk » Fri Aug 01, 2008 3:45 am

i didnt get this...

If 5 keys are assign to 5 cars...and if all are tried once with each..

ten at the end all cars will have their respective cars..

am i missing something..??

thx

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