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Alligation & Mixtures · Question 19 of 88

Question 19

HardOriginal question

A shopkeeper spends ₹900 on rice at ₹30 per kg and another ₹900 on rice at ₹45 per kg, and mixes the two. What does a kg of the mixture cost him?

Options for question 19

Show the answer and explanation
CorrectNot quiteAnswer A

Correct answer: A

Explanation

  1. ₹900 buys 30 kg of the first rice and 20 kg of the second: 50 kg for ₹1,800.

  2. 1,80050=36\frac{1{,}800}{50} = 36 rupees per kg.

Worth noting

₹37.50 averages the prices, which is right only for equal quantities; equal money buys more of the cheaper rice.

Concept
Equal money on each kind
Typical time
120 s
Your time
—
The rule this testsThe mean price of a mixture
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Ten questions from Alligation & Mixtures, at your own pace.

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