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A : B = 4 : 5, A : C = 10 : 9 then A : B : = ?

A : B = 4 : 5, A : C = 10 : 9 then A : B : = ? Correct Answer 20 : 25 : 18

A:B = 4:5 A:C = 10:9 A:B = (4 x 5) : (5 x 5) = 20:25 A:C = (10X2): (9X2) = 20:18 A:B:C = 20:25:18

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