The average of six numbers is 32. If each of first three numbers is increased by 2 and each of the remaining three numbe…

The average age of students of a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the…

A pupil's marks were wrongly entered as 83 instead of 63. Due to that the average marks for the class got increased by h…

The average age of 40 students of a class is 15 years. When 10 new students are admitted, the average is increased by 0.…

Of the four numbers, the first is twice the second, the second is one-third of the third and the third is 5 times the fo…

Amount five people with monthly income (in Rs.) 15000, 26000, 16000, 19000, 50000, how many will have income less than t…

The average of seven numbers is 18. If one of the numbers is 17 and if it is replaced by 31, then the average becomes :

In a family of 5 members, the average age at present is 33 years. The youngest member is 9 years old. The average age of…