ATQ, Quantity of petrol left in the container = y{1 – (a/y)}n Where, y = original quantity of petrol, a = quantity of petrol replaced and n = number of times the process is repeated. Therefore, quantity of petrol left in the container = 120{1 – (40/120)}3 = 35.55 ~ 35.5 litres
Total number of students in a class is 1920, and the ratio of number of boys to girls is 7:9. If the number of boys and girls is increased by a% and (a ...
What is the percentage change in the result when we add 36 to a certain number x, instead of subtracting 36 from the same number x?
Out of the total income of Anjali, she spends 20% on food, 40% on rent and 25% on groceries. Out of the remaining income, she donates 35% in a charity a...
The marks obtained by A is 25% more than B, and the marks obtained by C is 155 more than the difference of the marks obtained by A and B. If C obtained ...
Out of 800 people in a community, 25% speak French and the rest speak Spanish. If out of non-French speakers, 50% are males and out of French speakers 1...
A man invested all his current month income in starting of a new business in which he spends 40% in advertisement 30% of remaining in furniture 20% of r...
A number N undergoes a two-step adjustment: first, it is increased by 20%, and then it is subsequently decreased by 10% of the new value. After these ad...
In an election, two candidates A and B participated. 2⁄5 of the voters promised to vote for A and rest promised to vote for B. On the voting day 2...
A gets 30% of the full marks in an exam and fails by 80 marks. B gets 35% of the full marks in the same exam and he also fails by 64 marks. What is the ...
0.5 is what percentage of 20?
