A certain sum becomes Rs 840 in 3 years and Rs 1200 in 7 years at simple interest. What is the value (in Rs) of principal? 

What is the ratio of number of males in HR Department to the number of males in Accounts department respectively?

When a discount of 20% is given on a pizza, the profit is 32%. If the discount is 18%, then the profit is: 

The ratio of number of men and women in a factory of 720 workers is 7 : 5. How many more women should be joined to make the ratio 1 : 1?

Two-person X and Y invested their money in the ratio of 30:28 and the ratio of their respective profits at the end of a year is 10:4. If Y invested the money for 3 months, then for how much time (in months) x invested his money?

X liters of milk is taken out and replaced with water from a container having 240 liters milk. Now, 20% of the mixture is taken out and replaced with water. In final mixture, the difference in quantity of milk & water is 128 liters. Find X.

Direction: Study the double bar graph given below and answer the questions.

The ratio of the participants in exhibition of class IX with the total participants of class IX is: