Multiple choice

An alloy X consists of 95\% copper and 5\% brass and another alloy consists of 91\% copper and 9\% brass then in which ratio both of them mixed such that it consists 6\% brass?

  1. 3:4

  2. 4:3

  3. 1:3

  4. 3:1

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Let the ratio be x:y. Alloy X has 5% brass, Alloy Y has 9% brass. We want 6% brass. Using alligation: |5-6| : |9-6| = 1 : 3. So ratio of X:Y is 3:1 (since the part with higher brass gets lower weight). Verify: (3×5 + 1×9) ÷ 4 = 24÷4 = 6%. Option D is correct.