Cost of swimming

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sandeep_chhabra: Senior | Next Rank: 100 Posts; Posts: 73; Joined: Fri Feb 01, 2008 1:28 amFollowed by: 1 member; Location: India; Thanked: 1 times

by sandeep_chhabra » Thu May 15, 2008 2:55 am

I solved this question like this:

D + (2/3)DG
=> (3D + 2DG)/3 -----(taking LCM)
=> (D(3+2G))/2 -----(taking D common)

according to me answer should be choice D but somehow it is B. Dont know where am i going wrong

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Source: Beat The GMAT — Problem Solving | Thu May 15, 2008 2:55 am

ksh: Master | Next Rank: 500 Posts; Posts: 106; Joined: Sun Feb 17, 2008 10:09 pm; Thanked: 3 times

by ksh » Thu May 15, 2008 3:06 am

cost of swimming = d+2/3*d*(g-1)

=(3d+2dg-2d)/3 =d(2g+1)/3

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