In class A ratio of boys and girls is 7:5 whereas in class B this ratio is 5:3. It
is known that in class B number of students is double to that of number of
students in class A. If for today both class are combined, what will be ratio of
boys to girl in combined class?
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Answer:
7x+5x = 2x(5x+3x)
12x=2x×8x
2x=12/8
2x=3/2×2
x=3
now you can find 7x,5x after finding add the both and then find 2x(5x+3x )=48
no.of boys = 21+15=36
no. of girls = 15+15 =30
ratio = 36:30
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