Question

in class A, the ratio of boys to girls is 2:3.in class, the ratio of boys to girls is 4:5.if the ratio of boys to girls in both classes put together is 3:4,then find the ratio of number of girls in class A to number of girls in class B?

Answer 1

HEYA MATE♥♥

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HERE'S UA ANSWER :

Let us assume class A has 2x boys and 3x girls, class B has 4y boys and 5y girls.

\frac{2x + 4y}{3x + 5y}\\ = \frac{3}{4}\\

8x + 16y = 9x + 15y

x = y

Required ratio = \frac{3x}{5y}\\ (since x = y) = \frac{3}{5}\\

The question is "what is the ratio of number of girls in class A to number of girls in class B?"

Hence, the answer is "\frac{3}{5}\\". ..

HOPE IT HELPS UH ☺,☺

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