Question
In a college the ratio of boys and girls are in the
ratio 3:4. 40% girls and 20% boys were absent. Find the girls present if the total number of students in a college were 210.Solution
Boy : Girl = 3:4 Total number of students = 210 Number of Boys = (3/7) × 210 = 90 Number of Girls = (4/7) × 210 = 120 Number of girls absent = 40% × 120 = 48 Number of boys absent = 20% × 90 = 18 Total number of girls present = 120 – 48 = 72
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