Alligation Or Mixture
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20 litres of a mixture contains 20% alcohol and the rest water. If 4 litres of water be mixed in it, the percentage of alcohol in the new mixture will be
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-
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25%
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B.
Quantity of alcohol in 20 litres of mixture = 20% of 20 = 4 litres
Quantity of water in 20 litres of mixture = (20 - 4) = 16 litres
On adding 4 litres of water in mixture,
New quantity of water = (16 + 4) = 20 litres
New quanity of mixture = 24 litres
∴ Required per cent
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300 grams of sugar solution has 40% of sugar in it. How much sugar should be added to make it 50% in the solution?
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40 gram
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10 gram
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60 gram
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80 gram
C.
60 gram
In 300 gm of solution,
Percentage of sugar = 40%
∴ Sugar = 
Let x gm of sugar be added.
Now, according to the question
49 kg of blended tea contains Assam and Darjeeling tea in the ratio 5 : 2. Then the quantity of Darjeeling tea to be added to the mixture to make the ratio of Assam to Darjeeling tea 2 : 1 is
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4.5 kg
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3.5 kg
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5 kg
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6 kg
B.
3.5 kg
In 49 kg of mixture,
Tea of Assam
Tea of Darjeeling = (49 - 35)kg = 14 kg
Let x kg of Darjeeling tea be added
60 kg of an alloy A is mixed with 100 kg of alloy B. If alloy A has lead and tin in the ratio 3 : 2 and alloy B has tin and copper in the ratio 1 : 4, the amount of tin in the new alloy is
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53 kg
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44 kg
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80 kg
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24 kg
B.
44 kg
In 60 kg of alloy A,
Lead = 
Tin = 
In 100 kg of alloy B,
Tin = 
In 160 kg of new alloy,
Tin = 24 + 20 = 44 kg
A and B are two alloys of gold and copper prepared by mixing metals in the ratio 7 : 2 and 7 : 11 respectively. If equal quantities of the alloys are melted to form a third alloy C, the ratio of gold and copper in C wil be
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5 : 7
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5 : 9
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7 : 5
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9 : 5
C.
7 : 5
As the equal quantities of the alloys are melted to form a third alloy C.
∴ Required ratio would be
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