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13 Jan 2013, 12:35
00:00

Difficulty:

25% (medium)

Question Stats:

73% (02:08) correct 27% (00:00) wrong based on 11 sessions

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the ratio of rate of earning $2.75 for 5 days' work to the rate of earning$2.1 for 4 days' work is close to:

A.2.75:2.4 B.11:12 C.5:4 D.12:11 E.13.75:6

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[Reveal] Spoiler: OA
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 3427
Followers: 1162

Kudos [?]: 5157 [0], given: 55

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16 Jan 2013, 13:59
okay..if there happened to be some eratum in the question,i am really sorry about that,maybe the answer was predicted to be some sort of approximation to a whole number..but would you please explain on how you ended up getting 22:21..i just wanted to know clearly how it is possible to have ratio from unequal two separate number of days

Posted from my mobile device
Magoosh GMAT Instructor
Joined: 28 Dec 2011
Posts: 3427
Followers: 1162

Kudos [?]: 5157 [0], given: 55

Re: the ratio of the rate of earning $2.75 for 5 days' work to t [#permalink] ### Show Tags 16 Jan 2013, 15:38 chiccufrazer1 wrote: okay..if there happened to be some erratum in the question, i am really sorry about that, maybe the answer was predicted to be some sort of approximation to a whole number..but would you please explain on how you ended up getting 22:21..i just wanted to know clearly how it is possible to have ratio from unequal two separate number of days I'm happy to answer this. The question asks for "the ratio of rate of earning$2.75 for 5 days' work to the rate of earning $2.1 for 4 days' work" ----- it's asking for a ratio of rates, which is a very difficult idea. Rate #1 =$2.75/5 = $0.55 Rate #2 =$2.10/4 = $1.05/2 The ratio sought by the question is the ratio of these two rates: ratio = [Rate #1]/[Rate #2] = ($0.55)/[$1.05/2] = ($0.55)*(2/$1.05) =$1.10/$1.05 = 110/105 = 22/21 Does all this make sense? Mike _________________ Mike McGarry Magoosh Test Prep Re: the ratio of the rate of earning$2.75 for 5 days' work to t   [#permalink] 16 Jan 2013, 15:38
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