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RS Aggarwal Solutions Class 7 Mathematics Solutions for Percentage Exercise 10B in Chapter 10 - Percentage
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70% of the student in a school are boys and the number of girls is 504. Find the number of boys in
the school.
Answer:
Solution:-
Let the total number of students be 100
Then, as per the question, 70% of boys = 70
Number of girls = 30
Now, the total number of students when the number of girls is 30 = 100
Then, the total number of students when the number of girls is 504 = (100/30) × 504
= 1680
Total number of boys = 1680 – 504
= 1176
∴the number of boys in a school is 1176
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