Ratio, Proportion

Math and Mental Ability

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The ratio of the number of boys to that of girls in a school is 3:2. If 30% of boys and 70% of girls appeared in an examination, the ratio of students appeared in the examinations to that not appeared in the examination is ?

23:27

22:25

21:17

18:17

Explanation:

3:2 = 30:20 (Assume)
30% boys = (30/100) × 30= 9
70% girls = (70/100) × 20 = 14
(9+14) : (50-23) = 23 : 27

By: Deepak Dawra

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