An alloy of copper and nickel contains 60 percent copper. The ratio of copper and nickel in the second alloy is 17 ∶ 4. In what ratio should the two alloys be mixed so that in new alloy quantity of copper will be four times that of nickel?
1
1 ∶ 21
2
21 ∶ 1
3
16 ∶ 17
4
1 ∶ 16