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Question need help . thanks.

by silvia928 » Fri May 30, 2008 10:26 am
A total of 30 % of the geese included in a certain migration study were male. If some of the geese migrated during the study and 20% of the migrating geese were make, what was the ration of the migration rate for the male geese to the migration rate for the female geese?

A. 1/4
B.7/12
C. 2/3
D.7/8
E.8/7

ANS. (B)
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by aatech » Fri May 30, 2008 10:30 am
Suppose there were x geese... 30x/100 male 70x/100 Female

Supose y geese migrated .. 20y/100 male 80y/100 female

migration rate of male = (20y/100)/(30x/100) ----(1)

migration rate of female = (80y/100)/(70x/100) ----(2)

ratio = divide 1 by 2 = 7/12
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