Question
In a college the ratio of boys and girls are in the
ratio 7:9. 65% girls and 40% boys were absent. Find the girls present if the total number of students in a college were 320.Solution
Boy : Girl = 7:9 Total number of students = 320 N umber of Boys = (7/16) × 320 = 140 Number of Girls = (9/16) × 320 = 180 Number of girls absent = 65% × 180 = 117 Number of boys absent = 40% × 140 = 56 Total number of girls present = 180 – 117 = 63
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