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प्रश्न
In a college, if 15% of the boys are the same in number as one-third of the girls, then find the ratio of the number of boys to that of girls in the college.
विकल्प
20 : 7
7 : 20
20 : 9
9 : 20
MCQ
उत्तर
20 : 9
Explanation:
15% × Boys = `1/3` × girls
⇒ `15/100` × Boys = `"Girls"/3`
⇒ `3/20` × Boys = `"Girls"/3`
⇒ 9 Boys = 20 Girls
⇒ Boys : Girls = 20 : 9
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Percentage (Entrance Exam)
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