The ratio of number of boys to that of g...

The ratio of number of boys to that of girls in a group becomes `2:1` when 15 girls leave. But, afterwards, when 45 boys also leave, the ratio becomes `1 : 5`. Originally the number of girls in the group was

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The ratio of number of boys to that of girls in a group becomes 2:1 when 15 girls leave.But, afterward5when 45 boys also leave,the ratio becomes I Originally the number of girls in the group was 20 b.30 c.40 d.50

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KIRAN PUBLICATION-RATIO AND PROPORTION -TYPE-II

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