Question
Out of 840 students in a college, the proportion of boys
to girls is 3:4. In the midterm exam, 15% of boys and 10% of girls failed. How many students failed?Solution
ATQ,
Number of boys = (3/7) × 840 = 360
Number of girls = (4/7) × 840 = 480
Required number of students = 0.15 × 360 + 0.10 × 480 = 54 + 48 = 102
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