In an office, 40 % of the staff is female. 70 % of the female staff and 50 % of the male staff are married. The percentage of the unmarried staff in the office is 

A table is sold at a profit of 20%. If both the cost price and the selling price of the table are decreased by Rs. 100, then new profit percent becomes 25%.Find the original cost price of  table.

A’s income is 60% of B’s income, and A’s expenditure is 70% of B’s expenditure. If A’s income is 75% of B’s expenditure, find the ratio of A’s saving to B’s saving?

Population of a city is 7000. In next year the population is increased by 8%, then find the new population?

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?

In a school, number of girls is 75% of number of boys. Difference between boys and girls is 30. On a particular day 20% girls were absent, then find the number of girls those who present? 

What percentage of 5.6 kg is 140 grams?

The sum of the numbers of boys and girls in a school is 150. If the number of boys is x, the number of girls becomes x% of the total number of students. The number of boys is: