Question
Out of 750 students, the ratio of boys to girls is 6:4. The
ratio of boys who passed to those who failed is 8:1, and that of girls is 7:3. How many students passed the exam?Solution
ATQ,
Number of boys = (6/10) × 750 = 450
Number of girls = (4/10) × 750 = 300
Required number of students = (8/9) × 450 + (7/10) × 300 = 400 + 210 = 610
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