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Mixtures & Alligation · Question 12 of 60

Question 12

EasyOriginal question

A café blends coffee beans costing ₹800 per kg with beans costing ₹500 per kg to make a blend worth ₹620 per kg. What is the ratio of the ₹800 beans to the ₹500 beans?

Options for question 12

Show the answer and explanation
CorrectNot quiteAnswer B

Correct answer: B

Explanation

  1. ₹800 beans : ₹500 beans = (620−500):(800−620)(620 - 500) : (800 - 620).

  2. = 120:180=2:3120 : 180 = 2 : 3.

Worth noting

3:23 : 2 reverses the ratio. The mean ₹620 is nearer ₹500, so there are more of the ₹500 beans.

Concept
Alligation rule for the ratio of two prices around a mean price
Typical time
40 s
Your time
—
The rule this testsThe alligation rule
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