The average of $n$ numbers $x_{1}, x_{2}, \ldots, x_{n}$ is $x$. Then, the value of $\sum \limits_{i=1}^{n}\left(x_{i}-\bar{x}\right)$ is equal to
$n$
$0$
$n \bar{x}$
$\bar{x}$
$A , B , C , D\, \& \,E$ are five consecutive even numbers. Average of $A$ and $E$ is $46 .$ What is the largest number?
The average of the first $7$ integers in series of $13$ consecutive odd integers is $37 .$ What is the average of the entire series ?
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 girls is $15.4 \,years.$ The ratio of the number of boys to the number of girls in the class is
Sum of eight consecutive numbers of Set $A$ is $376$ What is the sum of $5$ consecutive numbers of another set if its minimum number is $15$ ahead of average of Set $A ?$
The average of the squares of of first ten natural numbers is