Question
In a class, the present students are in the ratio of
boys to girls as 4:1. If 10 girls are absent and they form 10% of the total class strength, and no boy is absent, then find the number of boys in the class.Solution
Total number of students = 10/0.10 = 100
Number of students who are present = 100 – 10 = 90
Therefore, number of boys in the class = 90 Ă— 4/5 = 72
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