Direction: Study the following information carefully and answer the questions given below.
 25% of the boys and 60% of the girls from a college participated in an event. The total number of girls in the college is equal to the number of boys, who do not participate in the event.

If the difference the number of boys and girls, who participated in the event is 40, then the total number of boys and girls in the college is

The sum of weights of A and B is 80 kg. 50% of A's weight is $${5\over6}$$ times the weight of B. Find the difference between their weights. 

The cost of an article was 75. The cost was first increased by 20% and later on it was reduced by 20%. The present cost of the article is:

If a number x is 10% less than another number y and y is 10% more than 125, then x is equal to-

The price of wheat is reduced by 4 % How many kilogram of wheat can now be bought for the money which was sufficient to buy 48 kg of wheat earlier?

A boy scored 125 marks and 140 marks in the first test and the second test respectively. If the maximum mark in each test is 150, then the percentage increase in his performance is ___________.