The average expenditure of a man for the first five months of a year is Rs. 5000 and for the next seven months it is Rs.…

The average age of 10 children is 9 years 9 months. The average of 9 children is 8 years 11 months. What is the age of t…

The average of 50 numbers is 38. If two numbers, namely 45 and 55 are discarded, the average of the remaining numbers is…

The average age of the boys in a class is 16 years and that of the girls is 15 years. The average age for the whole clas…

The average of some natural numbers is 15. If 30 is added to the first number and 5 is subtracted from the last number t…

If the arithmetic mean of seventy-five numbers us calculated, it is 35. If each number is increased by 5, then mean of n…

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 weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 …