The average of 10 items was found to be 80 but while calculating, one of the items was counted as 60 instead of 50. Then…

There are five boxes in a cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% more…

The average salary of all the workers in a workshop is Rs. 8000. The average salary of 7 technicians is Rs. 12000 and th…

3 years ago the average of a family of 5 members was 17 years. A baby having been born, the average age of the family is…

The average age of Ram and his two children is 17 years and the average age of Ram's wife and the same children is 16 ye…

The arithmetic mean of 15 numbers is 41.4. Then the sum of these numbers is-

The average weight of A, B and C is 45 kg. If the average weight of A and B be 40 kg and that of B and C be 43 kg, then …

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