1. In what ratio must a mixture of 30 %
alcohol strength be mixed with that of
50% alcohol strength so as to get a mixture of 45% alcohol strength?
(1) 1 : 2 (2) 1: 3
2. A shopkeeper bought 80 kg of sugar at
the rate of Rs. 13.50 per kg. He mixed it with 120 kg of sugar costing Rs. 16
per kg.. In order to make a profit of 20%, he must sell the mixture at
(1) Rs. 18 per kg (2)
Rs. 17 per kg
(3) Rs. 16.40 per kg (4) Rs. 15 per kg
3. Zinc and copper are in the ratio 5: 3
in 200 gm of an alloy. How much grams of copper be added to make the ratio as
3: 5?
(1)
133 1/3 (2) 1 / 200
(3) 72 (4)
66
4. 200 litres of a mixture contains 15 %
water and the rest is milk. The amount of milk that must be added so that the
resulting mixture contains 87.5% milk is
(1) 30 litres (2) 35 litres
(3) 40 litres (4) 45 litres
5. From a container, full of pure milk,
20% is replaced by water and this
process is repeated three times. At the end of third operation, the
quantity of pure milk reduces to
(1) 40.0 % (2) 50.0%
(3) 51.2% (4) 58.8%
6. A person blends two varieties of tea –
one costing Rs. 160 per kg and the other costing Rs. 200 per kg, in the ratio 5
: 4, He sells the blended variety Rs. 192 per kg. His profit per cent is :
(1) 8 (2)
9
(3) 10 (4)
12
7. Tea costing Rs. 136 a kilogram is
mixed with tea costing Rs. 141 a kilogram in the ratio 2: 3. The cost of one
kilogram of the mixture is
(1) Rs. 138 (2) Rs.
138.50
(3) Rs. 139 (4) Rs. 139.50
8. To gain 10 % on selling sample milk at
the coast price of pure milk. The quantity of water to be mixed with 50 kg. of
pure milk is
(1) 2.5 kg (2) 5 kg
(3) 7.5 kg (4) 10 kg.
9. 200 litres of a mixture contains milk
and water in the ratio 17: 3. After the addition of some more milk to it, the
ratio of milk to water in the resulting mixture becomes 7: 1. The quantity of
milk added to it was
(1) 20 litres (2) 40 litres
(3) 60 litres (4) 80 litres
10. 7 kg of tea costing Rs. 280 per kg is
mixed with 9 kg of tea costing Rs. 240 per kg. The average price per kg of the
mixed tea is
(1) Rs. 255.80 (2) Rs. 257.50
(3) Rs. 267.20 (4) Rs. 267.50
ANSWERS:
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2
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2.
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1
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1
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3
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3
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2
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10.
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2
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