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This problem gets me going crazy... I just couldnt figure

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Manager
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This problem gets me going crazy... I just couldnt figure [#permalink] New post 02 Aug 2006, 04:35
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A
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C
D
E

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This problem gets me going crazy... I just couldnt figure out how to arrive at the answer..Pls help
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VP
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Re: GMATPrep DS [#permalink] New post 02 Aug 2006, 06:12
this is easy C.

from i get the ratios and from ii get the number of men.

w/c= 5/2

c/m = 5/11

w/m= 25/11
w = 25
m = 11
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 [#permalink] New post 02 Aug 2006, 07:51
ST1. W:C is 5:2, C:M is 5:11

=> W:M is 25:22 (multiply 1st ratio by 5 and 2nd ratio by 2 so that C=10)

Not sufficient, because there infinite number of case that satisfy this ratio

ST2. W<30. This statement alone doesnot give us any info about Men.

ST1 & ST2: W:M is 25:22 AND W<30. The only possible way for this to be true (without cutting women into pieces :)) is if number of women = 25. Then Men=22.

So, together SUFF.

(C)
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 [#permalink] New post 02 Aug 2006, 08:01
Given w:c = 5:2

S1: c:m = 5:11
Therefore, w:m = 25:22
Not sufficient.

S2: #w < 30 Not sufficient.

S1 & S2: w/m = 25/22

Therefore, m = 22
Sufficient.

Answer: C
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 [#permalink] New post 02 Aug 2006, 12:00
1 is insuff, since it gives the ratio of M:W:C. However it does tell us that since fractions of humans cannot exist. min. women =25

2. insuff by itself, M is missing from ratios

combining 1, 2 we know that w=25, so can find M and so answer is C
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 [#permalink] New post 02 Aug 2006, 23:13
C

Given
W/C = 5/2

1) C/M = 5/11 Not suff

2) W<30 Not suff

Together
Remember C M and W have to be integers
henc W can be 25, 20, 15, 10 or 5

When W = 25 , C = 10 and M = 22
when W = 20 , C = 8 but M is nto an integer

Same thing when W = 15,10 or 5
Hence only with W = 25 we get the number of men
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Re: GMATPrep DS [#permalink] New post 05 Aug 2006, 15:31
lan583 wrote:
This problem gets me going crazy... I just couldnt figure out how to arrive at the answer..Pls help


(2) no mention about Men

ACE

(1) Insuff

(1) & (2) only Women =25 would give an integer value for Men

Hence Suff

C

Heman
Re: GMATPrep DS   [#permalink] 05 Aug 2006, 15:31
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