In an examination, 50% of the students passed in Science and 75% passed in Social Science, while 20% students failed in both the subjects. If 270 students passed in both subjects, find the total number of students who appeared in the exam?

Due to a 25% increase in the price of rice per kg. a person is able to purchase 20 kg. less for Rs.400. What is the increased price of rice per kg.?

A man spends 80% of his income. His income is increased by 20% and he increase his expenditure by 10%. His saving are increased by:

25% of 120 + 40% of 380 = ? of 637

The expenditure on the cost of living of a man and his family is 60% of his salary. He gets two increments of 30% and 60% in his salary. If his saving increases by 250% of his initial saving, then the new cost of living expenditure is what percentage (rounded off to the nearest integer) of the increased salary?

The income of C is 20 % more than B's and the income of B is 25 % more than A’s. Find by how much percent is C's income more than A’s? 

A man had a certain amount with him. He spent 20% of that to buy an article and 5% of the remaining on transport. Then he gifted ₹ 120. If he is left with ₹ 1,400, the amount he spent on transport is: