Question

If A:b is 2:3 and B:c is 1:2 then A:B:C is:?

Answer 1

A:B=2:3
B:C=1:2
A:B:C=2:3:6

Answer 2

A:B = 2 : 3 and B : C = 1 : 2
Multiply (A:B) by 1 and (B:C) by 3
A : B = 2 : 3 
B : C = 3 : 6

A : B : C = 2 : 3 : 6