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Alligation & Mixtures · Question 40 of 88

Question 40

MediumOriginal question

In what ratio must salt at ₹8 per kg be mixed with salt at ₹13 per kg to get a mixture worth ₹11 per kg?

Options for question 40

Show the answer and explanation
CorrectNot quiteAnswer D

Correct answer: D

Explanation

  1. Cheaper : dearer =(d−m):(m−c)=(13−11):(11−8)=2:3= (d - m) : (m - c) = (13 - 11) : (11 - 8) = 2 : 3.

  2. In lowest terms, 2 : 3.

Worth noting

3 : 2 puts the ratio the wrong way round: each kind's share is the other kind's distance from the mean.

Concept
The alligation ratio
Typical time
90 s
Your time
—
The rule this testsThe rule of alligation
Practise this chapter →

Ten questions from Alligation & Mixtures, at your own pace.

Practise this chapter →

Ten questions from Alligation & Mixtures, at your own pace.