CAT 2021 Allegations and Mixtures Question (Hard)

Question

If a certain weight of an alloy of silver and copper is mixed with 3 kg of pure silver, the resulting alloy will have 90 silver by weight. If the same weight of the initial alloy is mixed with 2 kg of another alloy which has 90 silver by weight, the resulting alloy will have 84 silver by weight. The

Accepted Answer

Step 1 Let the weight of the initial alloy be kg, and let the silver content in it be . Case 1 Mix kg of this alloy with 3 kg pure silver 100 silver Final mixture weight Total silver Given final silver 90 So 1 Case 2 Mix same kg alloy with 2 kg of 90 silver Total weight Total silver Given silver 84

CAT 2021

Quantitative

Allegations and Mixtures

Hard

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