Three types of tea (namely a, b and c) costs Rs. 95/kg, Rs. 100/kg and Rs. 70/kg respectively. How many Kg. of each should be blended to produce 100 kg of mixture worth Rs. 90/kg, given that the quantities of band c are equal ?

There are 200 questions on a 3 hr examination. Among these questions are 50 mathematics problems. It is suggested that twice as much time be spent on each mathâ€™s problem as for each other question. How many minutes should be spent on mathematics problems?

A & B are two players. They select one number from 1 to 25. If both of them select the same number they will win. What is the probability of not winning in a single trial?