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Mixture, Alligation & Partnership — Quantitative Aptitude Questions & Practice

Practise 15 Mixture, Alligation & Partnership questions from Quantitative Aptitude for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

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Practice questions on Mixture, Alligation & Partnership — with answers

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1. A mixture of 20 litres contains milk and water, with 5 litres of water. What percentage of the mixture is milk?

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Answer: A

Milk quantity = 20-5 = 15 litres. Percentage of milk = (15/20) x 100 = 75%.

2. A mixture of 30 litres contains milk and water, with 10 litres of water. What percentage of the mixture is milk?

A58.67
B66.67
C71.67
D78.67

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Answer: B

Milk quantity = 30-10 = 20 litres. Percentage of milk = (20/30) x 100 = 66.67%.

3. A mixture of 40 litres contains milk and water, with 8 litres of water. What percentage of the mixture is milk?

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Answer: C

Milk quantity = 40-8 = 32 litres. Percentage of milk = (32/40) x 100 = 80%.

4. A mixture of 25 litres contains milk and water, with 15 litres of water. What percentage of the mixture is milk?

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Answer: D

Milk quantity = 25-15 = 10 litres. Percentage of milk = (10/25) x 100 = 40%.

5. In what ratio must a cheaper item worth Rs 40/kg be mixed with a dearer item worth Rs 60/kg to obtain a mixture worth Rs 52/kg?

A3:2
B2:3
C3:3
D2:5

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Answer: B

By the rule of alligation, ratio = (dear price - mean price) : (mean price - cheap price) = (60-52) : (52-40) = 8:12 = 2:3.

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Mixture, Alligation & Partnership — Quantitative Aptitude Questions & Practice

Practice questions on Mixture, Alligation & Partnership — with answers

1. A mixture of 20 litres contains milk and water, with 5 litres of water. What percentage of the mixture is milk?

2. A mixture of 30 litres contains milk and water, with 10 litres of water. What percentage of the mixture is milk?

3. A mixture of 40 litres contains milk and water, with 8 litres of water. What percentage of the mixture is milk?

4. A mixture of 25 litres contains milk and water, with 15 litres of water. What percentage of the mixture is milk?

5. In what ratio must a cheaper item worth Rs 40/kg be mixed with a dearer item worth Rs 60/kg to obtain a mixture worth Rs 52/kg?

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