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

The ratio of number of boys to that of girls in a group becomes 2 : 1 when 15 girls leave. But, afterward5 when 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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S CHAND IIT JEE FOUNDATION-RATIO AND PROPORTION -QUESTION BANK -15

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