Multiple choice

A grocer mixes coffee powder of 2 types, one of which is priced at Rs. 60 and the other at Rs. 90. What should be the ratio of combining the two, to sell the blended mix coffee powder of the two types at Rs. 80?

  1. 2 : 1

  2. 2 : 3

  3. 1 : 2

  4. 3 : 2
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using the alligation method: (90-80) / (80-60) = 10 / 20 = 1 / 2. The ratio is 1:2.

AI explanation

Using the rule of alligation, the ratio of the quantities is the difference between the higher price and the mean price to the difference between the mean price and the lower price. The required ratio is (90 minus 80) to (80 minus 60), which simplifies to 10 to 20 or 1:2. The result is 1:2.

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