In a laboratory experiment, a sample of air which is a mixture of oxygen and water vapour is taken. Water vapour, contains hydrogen and oxygen gases. If air contains a total of 70% oxygen (including that contained in the water vapour) by weight while water vapour contains 16.66% of oxygen by weight, how many kilograms of water vapour is present in 1 kilogram of air?
0.20
0.36
0.32
0.25
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In an election between two candidates, one got 55% of total valid votes. 20% of the total votes were invalid. The total number of votes were 7500. How many valid votes did the other person get?
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2
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What percent is 3% of 5% ?
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3
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Population of a town increase 2.5% annually but is decreased by 0.5% every year due to migration. What will be the percentage increase in 2 years?
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4
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The ratio 5 : 4 expressed as a percent equals :
Solution5 : 4 = 5/4 = ( (5/4) x 100 )% = 125%. |
5
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(X% of Y) + (Y% of X) is equal to:
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6
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The population of a city is 35000. On an increase of 6% in the number of men and an increase of 4% in the number of women, the population would become 36760. What was the number of women initially?
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7
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What is 15 percent of Rs. 34.?
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8
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In an election between two candidates, the winner got 65% of the total votes cast and won the election by a majority of 2748 votes. What is the total number of votes cast if no vote is declared invalid?
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9
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The price of raw materials has gone up by 15%, labor cost has also increased from 25% of the cost of raw material to 30% of the cost of raw material. By how much percentage should there be reduction in the usage of raw materials so as to keep the cost same?
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10
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Gauri went to the stationers and bought things worth Rs. 25, out of which 30 paise went on sales tax on taxable purchases. If the tax rate was 6%, then what was the cost of the tax free items?
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