Question

An alloy of artificial gold contains 83% Copper and

Q: An alloy of artificial gold contains 83% Copper and remaining Aluminium. In an another alloy, Copper

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remaining Aluminium. In an another alloy, Copper is 91% and Aluminium is 7%. In what ratio should the two alloys be mixed so that the new mixture have 15% Aluminium. Also find the % of Copper in the new mixture?

A 84.6%, 4:1

B 75.8%, 2:1

C 82.5%, 5:3

D 78.4%, 6:7