Quote:
Originally Posted by ram_ram
The Q shld read as What fraction of female in the total pop. have Master degree
Let T be the total population;M=Males,F=Females..
Therefore T=M+F
Males with Master Degree = 0.2M
Females with Master Degree = 0.75F
So Total Pop. with mas. Deg = 0.3T=0.3(M+F)
0.3(M+F) = 0.2M+ 0.75F
0.3M+0.3F=0.2M+0.75F
0.1M=0.45F
M=4.5F
coming to Q,
0.75F/T
0.75F/M+F
0.75F/4.5F+F
0.75F/5.5F
75/550
3/22
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IMO 3/22 Same way as above