A reduction of 20 % in the price of salt enabled a purchaser to obtain 4 kg. more for Rs. 100. The reduced price of salt per kg is :

If the price of petrol be raised by 20%, then the percentage by which a car owner must Reduce his consumption so as not to increase his expenditure on petrol is 

A cloth merchant sold half of his cloth at a 40% profit. half of remaining at 40% loss and the rest was sold at the cost price. In the total transaction, his gain or loss will be

Mohan gets 3 marks for each correct sum and loses 2 marks for each wrong sum. He attempts 30 sums and obtains 40 marks. The number of sums solved correctly is:

if the monthly salary of a fan employee is increased by $$ 2{2\over 3}\% $$, he gets 72 rupees more. His Monthly salary (in rupees) is:

In an exhibition entrance charge was Rs.5 and now it is reduced by 20%. Therefore total income on selling the tickets is increased by 44%, then what is the percent increase in tickets sold?

Average of ten positive numbers  is x. If each number is increased by 12%  then x is increased by

In an examination, 30 percent of the students failed in English and 25 percent of the students failed in mathematics. If 15 percent of the candidates failed in both subjects, then what percentage of students passed in both subject.