An alloy contains a mixture of two metals X and Y in the ratio of 2 ∶ 3. The second alloy contains a mixture of the same metals, X and Y in the ratio 7 ∶ 3. In what ratio should the first and the second alloys be mixed so as to make a new alloy containing 50% of metal X?
1
3 ∶ 4
2
3 ∶ 1
3
5 ∶ 6
4
2 ∶ 1