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164 calculate ratio of birds

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by ern5231 » Wed Oct 07, 2009 9:07 am
In a group of birds 60% were male birds. Certain birds in this group were migratory birds out of which 20% birds were male. The total male birds to male migratory birds ratio is x and the total female birds to female migratory birds ratio is y. What is the value of x/y?
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by xcusemeplz2009 » Wed Oct 07, 2009 9:45 am
imo x/y=6
It does not matter how many times you get knocked down , but how many times you get up
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by ern5231 » Wed Oct 07, 2009 10:19 am
yeah u got that rite. OA is 6:1. Can you show the working?
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by xcusemeplz2009 » Wed Oct 07, 2009 10:36 am
yeah sure

let g be the group ; male=.6g and female=.4g
let m be the migrating no.; mig male=.2m and mig fem=.8m

as per Q x= .6g/.2m=3g/m
y=.4g/.8m= 2 g/m

x/y=6
It does not matter how many times you get knocked down , but how many times you get up
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