The average of five numbers is $6.9 .$ If one of the numbers is deleted, the average of the remaining numbers is $4.4 .$ What is the value of the number deleted?

If the difference between the average of $x, y$ and $y$, $z$ is $12,$ then the difference between $x$ and $z$ is

Amitabh's average expenditure for the $January$ to $June$ is $Rs.\, 4200$ and he spends $Rs.\, 1200$ in $January$ and $Rs. \,1500$ in $July.$ The average expenditure for the month of $February$ to $July$ is (in $Rs.$)

The average of the price per $kg$ of rice at $10$ different places was $Rs.\, 4.85.$ After a week, the price per $kg.$ was increased by $20$ paise at $3$ places and decreased by $10$ paise at one place. The new average of price per $kg$ is in $Rs.$

The average salary of all the associates in a team is $Rs.\,16000.$ The average salary of $7$ senior associates is $Rs.\,24000$ and the average salary of the rest is $Rs.\, 12000$. How many associates work in that team?

The average of certain first consecutive natural numbers is $20.5 .$ Find their sum.