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tuf ques..

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Source: — Data Sufficiency |
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by mental » Thu Oct 09, 2008 9:38 am
imo: B
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by Gmatss » Thu Oct 09, 2008 9:42 am
Ratio of M:F 3:7
After movement M:F 2:8

so 2/3/8/7 = 7/12
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by stubbornp » Thu Oct 09, 2008 7:47 pm
Can anyone explain this???tnx
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by stubbornp » Thu Oct 09, 2008 7:50 pm
Can anyone explain this???tnx
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by raju232007 » Thu Oct 09, 2008 8:23 pm
Before migration the ratio of no of males to females is 3:7
After migration the ratio has been altered and the new ratio of males to females is 2:8

Using the given formula in the question stem the ratio of migration of male geese to the rate of migration of female geese can be determined..


(migrating(males)/total males)/(migrating(females)/total females)
(2/3)/(8/7)=7/12

Hence the ans is B...
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by cubicle_bound_misfit » Thu Oct 09, 2008 8:28 pm
let there be originally 100 geese.

30 male 70 female.

some geese say X migrated out of x again x/5 male, 4/5 x female

so we have to find

(male geese migrating/number of male )* (number of female/female geese migarating)

[x/5:4x/5 == .2x/.8x==2x/8x]

hence,(2x/30)*(70/8x) == 7/12.

hope that will help.
regards,
Cubicle Bound Misfit
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