Ravi had five subjects in his final examination. The maximum marks in each subject are 100. If his percentage in four subjects is 80, and he scores 65 marks in the fifth subject, determine his overall percentage for the five subjects.

A man spends 75 % of his income. His income increased by 20 % and he increased his expenditure by 15 %. His savings will then be increased by: 

In a class, the average score of girls in an examination is 73 and that of boys is 71. The average score for the whole class is 71.8. Find the percentage of girls. 

In a factory 60 % of the workers are above 30 years and of these 75 % are males and the rest are females. If there are 1350 male workers above 30 years, the total number of workers in the factory is: 

In an examination in which full marks were 500. A got 25% more than C, C got 20% less than D. If A got 360 marks. What percentage of full marks was obtained by D ? 

Population of a town increases by 12% every year. If the population of town will be 188160 after 2 years, then what is its present population?