GMAT Prep Test 1 DS 4

let time taken for be Tx and tht for Y be Ty..

stmt 1 - 1/Tx + 1/Ty = 2Tx/3...this when solving gives a relation b/w Tx and Ty...So suff.

stmt 2 - straight forward...you'll get the same relation b/w Tx and Ty as derived in 1st stmt....So Suff..........Ans is D.

Trying hard!!!

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me4mba: Junior | Next Rank: 30 Posts; Posts: 26; Joined: Wed Apr 11, 2007 10:33 am; Thanked: 8 times

by me4mba » Wed Oct 24, 2007 2:14 pm

How can you get the difference in hours though?

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samirpandeyit62: Master | Next Rank: 500 Posts; Posts: 460; Joined: Sun Mar 25, 2007 7:42 am; Thanked: 27 times

by samirpandeyit62 » Thu Oct 25, 2007 12:27 am

E IMO

A,B only give proportions not exact values insuff

combine we get same info as in stmt A Insuff

E

Regards
Samir

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raulverde: Senior | Next Rank: 100 Posts; Posts: 91; Joined: Wed May 16, 2007 5:46 am; Thanked: 2 times

by raulverde » Thu Oct 25, 2007 12:27 pm

Another vote for E. We don't have any specific times.

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