In what ratio must a solution at Rs 30 per kg be mixed with another at Rs 50 per kg to get a mixture worth Rs 40 per kg?

Answer and explanation

Correct answer: C. 1 : 1

  1. Step 1: Use alligation: the ratio is (dearer - mean) : (mean - cheaper) = (50 - 40) : (40 - 30).
  2. Step 2: That is 10 : 10, which simplifies to 1 : 1.
Answer
1 : 1.

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