When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is …

The average of 4 positive integers is 59. The highest integer is 83 and the lowest integer is 29. The difference between…

The average weight of boys in a class is 30 kg and the average weight of girls in the same class is 20 kg. If the averag…

The average of 80 boys in a class is 15. The average age of a group of 15 boys in the class is 16 and the average age of…

In an examination average marks obtained by the girls of a class is 85 and the average marks obtained by the boys of the…

The average age of an adult class is 40 years. 12 new students with an average age of 32 years join the class, thereby d…

The average age of mother and her six children is 12 years, which is reduced by 5 years if the age of mother is excluded…

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