In a 400 ml mixture of water and milk the quantity of water is 70%. How much milk must be added to the mixture so that the quantities of milk and water in the mixture become equal?

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2 .

Fresh fruits contain 70% water in them whereas dry fruits contain 25% water. Find the quantity of dry fruits that can be obtained from 100 kg fresh fruits.

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3 .

If the cost price of 15 articles is equal to the selling price of 12 articles, the profit percentage is

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4 .

The average of 15 numbers is 40. The average of first eight numbers is 30. If the average of last eight numbers is 50, then the eighth number is

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5 .

An item priced at Rs. 300 is sold at 10% gain. If the selling price is reduced by 15%, what will be the gain or loss per cent?

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6 .

The ratio of three numbers is 2 : 3 : 5 and their product is 10290. Find all the numbers

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7 .

A shopkeeper allows a discount of 10% on the marked price. By what per cent above the cost price must he mark his goods to gain 8%?

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8 .

A sum of money lent at compound interest for 2 years at 20% per annum would fetch Rs. 482 more, if the interest was payable half-yearly rather than annually. The sum is

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9 .

A sells an article to B for Rs. 45000 at a loss of 10% in the transaction. B sells it to C at a price which gives a profit of 10% to A. By what per cent does B gain?

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10 .

A man can row against a current three-fourths of a kilometre in 15 minutes and returns the same distance in 10 minutes. The ratio of his speed to that of the current is

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