For the following questions answer them individually
Among three numbers, the first is twice the second and thrice the third. If the average of the three numbers is 49.5, then the difference between the first and the third number is
The mean of 50 numbers is 30. Later it was discoverd that two entries were wrongly entered as 82 and 13 instead of 28 and 31. Find the correct mean.
If the selling price of 10 articles is equal to the cost price of 11 articles, then the gain percent is
While selling a watch, a shopkeeper gives a discount of 5%. If he gives a discount of 6%, he earns 15 less as profit. What is the marked price of the watch?
Krishna purchased a number of articles at ’10 for each and the same number for 14 each. He mixed them together and sold them for 13 each. Then his gain or loss percent is
A trader bought two horses for 19,500. He sold one at a loss of 20% and the other at a profit of 15%. If the selling price of each horse is the same, then their cost prices are respectively.
The cost price of an article is 40% of the selling price. What percent of the cost price is the selling price?
If 90% of A = 30% of B and B = (2x)% of A, then the value of x is
When the price of sugar decreases by 10%, a man could buy 1 kg more for 270. Then the original price of sugar per kg is
If the price of sugar is raised by 25%, find by how much percent a householder must reduce his consumption of sugar so as not to increase his expenditure?
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