Average Questions

A man's pension on retirement from service is equal to half the average salary during the last $3\text{ years}$ of his service. His salary from 1-1-1983 is $\text{₹ }380$ per month, with increment of $\text{₹ }40$ due on 1-10-83, 1-10-84 and 1-10-85. If he retires on 1-1-86, what pension does he draw per month?

The batting average for $30\text{ innings}$ of a cricket player is $40\text{ runs}$. His highest score exceeds his lowest score by $100\text{ runs}$. If these two innings are not included, the average of the remaining $28\text{ innings}$ is $38\text{ runs}$. Then the lowest score of the player is:

The average marks obtained by a group of $25$ students was $24$. One student left the group as a result of which the average of the remaining students rose to $25$. But another student came in as a result of which the average marks of the group dropped a bit and became $24.8$. What was the average marks obtained by the student who left and the one who joined later?

A person travels $600\text{km}$ by truck at $80\text{km/h}$, $800\text{km}$ by aeroplane at $400\text{km/h}$ and $100\text{km}$ by motorcycle at $50\text{km/h}$. What is the average speed for the entire distance?

If $a,b,c,d,e$ are five consecutive odd numbers, then their average is:

Of the three numbers, the second is twice the first and thrice the third. If the average of the three numbers is $44$, the largest number is: