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How many kg of salt at ₹42 per kg must be mixed with 25 kg of salt at ₹24 per kg so that selling the mixture at ₹40 per kg gives a 25% profit?

Competition practiceProfit, Loss & Discount

A31.25 kg
B25 kg
C20 kg
D16 kg

Step-by-Step Solution

Cost price of mixture

= \frac{40}{1.25} = ₹32

. Dear : cheap

= (32 - 24) : (42 - 32) = 4 : 5

. So

25 \times \frac{4}{5} = 20

kg.

Answer: C) 20 kg

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