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no of boys and girls=80
no of girls and boys in ratio=8:2
let no of girls and boys in ratio be 6x+2x=80
no of girls=6 x 10=60
no of boys=2 x 10=20
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Let ratio of grls to boyz =6x:2x Thrfor 6x+2x=80 8x=80 x=10 Then grls =6X10=60 Similarly boys = 20
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