Question
Which gas is most abundant in the Earth's
atmosphere.Solution
Nitrogen makes up about 78% of the Earth's atmosphere.
A student gets an aggregate of 60% marks in five subjects in the ratio 10 : 9 : 8 : 7 : 6. If the passing marks are 45% of the maximum marks and each s...
A man invested all his current month income in starting of a new business in which he spends 25% in advertisement 20% of remaining in furniture 10% of r...
Rajeev spends 30% of his monthly income on cloths and food and 20% of remaining on rent and saves the remaining amount. If he saves Rs 17920 per month, ...
The average age of three children in a family is 35% of the average of the age of father and the eldest child. The total age of the mother and the young...
A number is increased by 20% and then decreased by 25%. Find the net change %.
- Initially, Rina’s salary was Rs. 40,000 and the ratio of her expenditure to her savings was 3:5. After a salary increase, she reduced her expenditure by ...
A Fruit seller purchased 1530 bananas at the rate of Rs. 20 per dozen. 90 bananas get rotten. In order to make a 20%, he must sell the remaining bananas...
A quantity is increased by 60% at first, and later decreased by 45%. Calculate the net percentage change.
- Ravi appeared for two papers: Physics and Chemistry. He scored 68 out of 80 in Physics and 74 out of 85 in Chemistry. Calculate his total percentage marks.
The marks obtained by A is 25% more than B, and the marks obtained by C is 140 more than the difference of the marks obtained by A and B. If C obtained ...
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