A survey of n people in the town of X found that 50% of them prefer Brand A. Another survey of 100 people in the town of Y found that 60% prefer Brand A. In total, 55% of all the people surveyed together prefer Brand A. What is the total number of people surveyed?

Which set of numbers is like the given set [48,24,12] ?

A shopkeeper purchases 70kg of potatoes for Tk. 420 ans sold the whole lot as the rate of Tk. 6.50 per kg. Wha...

A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The lea...

If p-q=3 and p^2+q^2 = 29, find the value of pq.

If m and n are whole numbers such that m^n = 121, the value of (m-1)^n+1 is

A culprit was spotted by a policeman from a distance of 250 meter. When the policeman started running towards...