The average weight of 3 men, A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If an…

Ten years ago, the ages of the members of a joint family of eight people added up to 231 years. Three years later, one m…

A certain factory employed 600 men and 400 women and the average wage was Rs. 25.50 per day. If women got Rs. 5 less tha…

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

The body weight of seven students of a class is recorded as 54 kg, 78 kg, 43 kg, 82 kg, 67 kg, 42 kg and 75 kg. What is …

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 of 9 observations was found to be 35. Later on, it was detected that an observation 81 was misread as 18. Th…

The average sale of car dealership was 15 cars per week. After a promotional scheme the average sale increased to 21 car…