I was preparing for Quantitative aptitude exams and I came across this question of ratios
An alloy contains copper and zinc in ratio 5:2 and another alloy contains zinc and tin in the ratio 3:2. If 2 parts of 1st alloy and one part of second alloy are melted together to form a new alloy of copper, zinc and tin, the ration of the metals will be?
What I've understood is that 2 parts of 1st ratio(lets call it A) means 2*A=10:4 and 1 part of the second ratio(lets call it B) means 1*B=3:2. Now when these parts are melted together the ratios will be copper:zince:tin=10:4+3:2 Did I get this right or not?