1. In a mixture of milk and water the proportion of water by weight was 75%. If in the 60 gms mixture 15 gms water was added, what would be the percentage of water in the new mixture ?
(1) 75% (2) 88%
(3) 90% (4) 100%
(5) None of these
2. A man purchased 35 kg of rice at the rate of Rs. 9.50 per kg and 30 kg at the rate of Rs. 10.50 per kg. He mixed the two. Approximately, at what price (in Rupees) per kg should he sell the mixture to make 35 per cent profit in the transaction ?
(1) 12 (2) 12.50
(3) 13 (4) 13.50
(5)None of these
3. In 1kg mixture of sand and iron, 20% is iron. How much sand should be added, so that the proportion of iron becomes 5% ?
(1) 3 kg (2) 4 gms
(3) 5 gms (4) 6 kg
(5) None of these
4. The wheat sold by a grocer contained 10% low quality wheat. What quantity of good quality wheat should be added to 150 kgs of wheat so that the percentage of low quality wheat becomes 5% ?
(1) 150 kgs (2) 135 kgs
(3) 50 kgs (4) 85 kgs
(5) None of these
5. A grocer purchased 2 kg. of rice at the rate of Rs. 15 per kg. and 3 kg. of rice at the rate of Rs. 13 per kg. At what price per kg should he sell the mixture to earn 331/3% profit on the cost price ?
(1) Rs. 28.00 (2) Rs. 20.00
(3) Rs. 18.40 (4) Rs. 17.40
(5) None of these
6) When one litre of water is added to a mixture of acid and water, the new mixture contains 20% acid. When one litre of acid is added to the new mixture, then the resulting mixture contains 33 1/3% acid. The percentage of acid in the original mixture was
(1) 20% (2) 22%
(3) 24% (4) 25%
5)Non of these
7. Two barrels contain a mixture of ethanol and gasoline. The content of the ethanol is 60% in the first barrel and 30% in the second barrel. In what ratio must the mixtures from the first and the second barrels be taken to form a mixture containing 50% ethanol ?
(1) 1 : 2 (2) 2 : 1
(3) 2 : 3 (4) 3 : 2
5)Non of these
8. The wheat sold by a grocer contained 10% low quality wheat. What quantity of good quality wheat should be added to 150 kgs of wheat so that the percentage of low quality wheat becomes 5% ?
(1) 150 kgs (2) 135 kgs
(3) 50 kgs (4) 85 kgs
(5) None of these
9. 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 will be :
(1) 5 : 7 (2) 5 : 9
(3) 7 : 5 (4) 9 : 5
5)Non of these
10. A container has 30 litres of water. If 3 litres of water is replaced by 3 litres of spirit and this operation is repeated twice, what will be the quantity of water in the new mixture ?
(1) 24 litres (2) 23 litres
(3) 24.3 litres (4) 23.3 litres
(5) None of these
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