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1. Each boy contributed money equal to the number of girls and each girl contributed money equal to the number of boys in a class of 60 students. If the total contribution thus collected is Tk. 1,600, how many boys are there in the class?
- A. 30
- B. 30
- C. 30
- D. 30
Answer: Option D
Explanation:
Let's say,
Number of boys=x
So, number of girls=60-x
As per the question,
x×(60-x)+(60-x)×x=1600
or, x=20
So there are 20 boys
(ans)
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