In a mixture of three varieties of pulses, the ratio of their weight is 4 : 5 : 8. If 5 kg of pulses of the first variety, 10 kg of the second variety and some quantity of pulses of the third variety are added to the mixture, the ratio of the weights of three varieties of pulses becomes as 5 : 7 : 9 . In the final mixture, find the quantity of third variety of pulses was?

If 0.8 : X  :: 5 : 8 then X is equal to

A and B together have ₹ 158. C has ₹101 less than what A and B together have, and B has ₹ 23 more than C. The amount of A is:

The speed of three cars in the ratio 4 : 5 : 8 . What is the ratio among the time taken by these cars to travel the same distance ? 

In a certain school, the ratio of boys to girls is 7 : 5. If there are 2400 students in the school, then how many girls are there?

The ratio of marks obtained by Rajesh, Rakesh and Ramesh in an exam is 2 : 4 : 9. What are the marks obtained by Rakesh and Ramesh, if Rajesh scored 30 marks in the exam?