Question

16. In a given class room, the number of boys is twenty greater than the

number of girls. If the ratio of the number of boys to the number of
girls is 7:5 then find
a) The number of girls

Answer 1

The number of girls in the classroom is 50.

Step-by-step explanation:

Let's denote the number of girls as G. According to the given information, the number of boys is twenty greater than the number of girls, so the number of boys can be represented as G + 20. We are also given that the ratio of the number of boys to the number of girls is 7:5.

This can be written as (G + 20) / G = 7 / 5. To solve this equation, we can cross multiply and simplify it to 5(G + 20) = 7G.

Expanding and solving for G, we get G = 50.

Therefore, the number of girls in the classroom is 50.

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