[solved] Gmat Prep. Q11

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maxim730: Senior | Next Rank: 100 Posts; Posts: 76; Joined: Tue Dec 26, 2006 11:26 amFollowed by: 3 members

by maxim730 » Wed Mar 14, 2007 5:52 pm

Practise Test 2

Please see image. Thanks for any help.

Doh!!. I figured it out, simple stupid error.

Will post my explanation later on.

Ans.: D

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Source: Beat The GMAT — Problem Solving | Wed Mar 14, 2007 5:52 pm

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

by Cybermusings » Tue Mar 27, 2007 11:06 am

Let Kate Charge x hours

Therefore Pat charges 2x hours and Mark Charges 3 times of 2x = 6x hours

x+2x+6x = 162

x = 18
Mark charges 6*18 = 108 Hours

Hence the difference = 108-18 = 90 Hours

pretty much a cakewalk

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BTGmoderatorRO: Moderator; Posts: 772; Joined: Wed Aug 30, 2017 6:29 pmFollowed by: 6 members

by BTGmoderatorRO » Fri Sep 29, 2017 2:52 pm

pat (P), kate (K) and mark (M).
P=P
P=2K (twice). therefore, K= P/2
P=(1/3)M. therefore M=3P

P+K+M = 162
P + (P/2) + 3P = 162
(2P+P+6P)/2 =162
9P = 324
P=36

K=36/2= 18
M=3*36= 108

The difference between Kate and Mark is 108-18=90

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