In a school 80% of the students are girls. The number of boys are 500. Then the total number of students in the school is

The population of a city is 48,600. If there is a 25% increase in the first year and a reduction of 8% in the second year, then what will be the population of this city at the end of 2 years?

A number is decreased by 20% to get another number. The number so obtained is increased by 200% to get a third number. The difference of the third number and the original number is what percentage more or less than the difference of second and the third number?

If 30% of Aman's income is added to 40% of Raman's income, the answer is 80% of Raman's income. What percentage of Aman's income is Raman's income?

The difference of two numbers is 15 % of their sum. the ratio of the larger number to the smaller number is: 

If there is a 25 percent reduction in the price of rice, a person can buy 10 kg more rice for Rs 600. The reduced price per kg of rice is.

Mohan gets 4 marks for each correct sum and losses 1 marks for each wrong sum. He attempted 30 sum and obtains 50 marks. The number of sums solved correctly is? 

If the cost price of 15 tables is equal to the selling price of 20 tables. The loss percent is: