One-fourth of certain journey is covered at the rate of 25 km/h, one-third at the rate of 30 km/h and the rest at 50 km/…

The average of six numbers is 3.95. The average of two of them is 3.4, while the average of the other two is 3.85. The a…

In an exam, the average marks obtained by Jhon in English, Math, Hindi and Drawing were 50. His average mark in Maths, S…

The average age of 30 boys in a class in 15 years. One boy, aged 20 years, left the class, but two new boys came in his …

My Scooty gives an average of 40 kmpl of petrol. But after recent filling at the new petrol pump, its average dropped to…

The average of 20 students is 12 years, if the teacher's age is included, average increases by one. The age of the teach…

If the average marks of three batches of 55, 60 and 45 students respectively is 50, 55, 60, then the average marks of al…

The average of the first nine prime numbers is-