A batsman makes a score of 270 runs in the 87<sup>th</sup> inning and thus increase his average by a certain…

The average of n numbers x<sub>1</sub>, x<sub>2</sub>.....x<sub>n</sub> is $$\overli…

The average age of a group of persons going for picnic is 16 years. Twenty new persons with an average age of 15 years j…

The average income of A, B and C is Rs. 12,000 per month and average income of B, C and D is Rs. 15,000 per month. If th…

The average of 30 numbers is 40 and that of other 40 numbers is 30. The average of all the numbers is :

The average age of a family with 5 members is 28. If one of the 5 members of age 20 is excluded the average age of the f…

The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 gra…

A fruit seller sold big, medium and small sizes apples of Rs. 15, Rs. 10 and Rs. 5, respectively. The total number of ap…