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Gmat Prep Ratio?

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Master | Next Rank: 500 Posts
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by dferm » Wed Nov 28, 2007 10:48 pm
At a certain college there are twice as many English majors as history majors and three times as many English majors as mathematics majors. WHat is the ratio of the number of history majors to the number of mathmatics major?

A. 6 to 1
B. 3 to 2
C. 2 to 3
D. 1 to 5
E. 1 to 6
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by camitava » Wed Nov 28, 2007 11:24 pm
dferm, ur qs -
At a certain college there are twice as many English majors as history majors and three times as many English majors as mathematics majors. WHat is the ratio of the number of history majors to the number of mathmatics major?

A. 6 to 1
B. 3 to 2
C. 2 to 3
D. 1 to 5
E. 1 to 6
From Qs, H = 2E -> 3H = 6E
And M = 3E -> 2M = 6E
So 3H = 2M
Or H : M = 2 : 3. So IMO -> C.
The principle to have the LCM of 2 and 3 here and multiply the number by quotient when LCM divided by that number.
Correct me If I am wrong


Regards,

Amitava
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by ri2007 » Thu Nov 29, 2007 6:19 am
i agree with the apporach camitava has taken but my ans is 3/2

pls confirm
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by camitava » Thu Nov 29, 2007 6:46 am
RI2007, I generally got confused by these kind of structures -
there are twice as many English majors as history majors
- By this, I understood H = 2E but according to you E = 2H. I am really got confused by this. Hope, u r right! :cry: :wink:
Correct me If I am wrong


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Amitava
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GMAT PREP RATIO?

by dferm » Thu Nov 29, 2007 9:10 am
Can someone please elaborate on this topic further...?
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