Math
If the cost of sugar increases by 25%, by what percentage should the consumption of sugar be decreased in order to keep expenditure fixed?
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Rs. 6000 is lent out in two parts. One part is lent at 7% simple interest and the other at 8% simple interest. The total interest after one year is Rs. 450. Find the ratio of the amounts lent at the lower and higher rates.
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The average age of 15 students of a class is 15 years. The average age of 5 students is 10 years and that of another 9 students is 16 years. The age of the 15th student is:
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A total of 3000 chocolates were distributed among 120 boys and girls such that each boy received 30 chocolates and each girl received 3 chocolates. Find the respective numbers of boys and girls.
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The mean of 50 observations was 36. It was found later that an observation of 48 was wrong. The corrected new mean is:
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The average of 13 numbers is 60. The average of the first 7 is 57 and that of the last 7 is 61. Find the 7th number.
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1 inch is equal to:
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Find the average of the series: 312, 162, 132, 142 and 122.
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A trader purchased two color televisions for Rs. 35,000. He sold one at 20% profit and the other at 40% profit. If the overall profit was 32%, find the difference in their cost prices.
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