Mean or Arithmetic Mean

The arithmetic mean of numbers $5.7,6.6,7.2,9.3,6.2$ is $7$.

The mean of $p$ numbers is $b$ and mean of $\left(p+q\right)$ numbers is $a$, then the mean of $q$ numbers is _____.

The mean of $n$ numbers is $x$. If $k$ is added to each number the mean of the new numbers will be _____.

The mean of numbers $4,5,6,5,x,5,4,8,6,2,5,3$ is $5$, then $x=$_____.

The arithmetic mean of numbers $77,73,79,70,72,76,75,76,74,78$ is _____.

The mean of numbers $5,7,12,8,10,18,24$ is _____.

From the following frequency distribution table the mean age is $17$ years.

then the value of $x$ is 

The frequency of three numbers $12,15$ and $20$ are $\left(x+2\right),x$ and $\left(x-1\right)$ respectively. If the mean of the distribution is $14.5$, then the value of $x$ is

The mean of the prime numbers between $1$ and $10$ is

The mean of the integer from $1$ to $10$ is 

The mean of $n$ number of terms of a series is $\overline{x}$. If the sum of first $\left(n-1\right)$ terms is $k$, then the $n^{\mathrm{th}}$ terms will be

The cost price $\left(\mathrm{in} ₹\right)$ of $12$ books are given below:

$16,20,24,20,28,20,16,32,24,8,20,12$.

Find the mean cost price of the books?

The marks obtained by some students in Mathematics are given below:

$40,60,64,48,0,36,100,80,84,52,72,4,28,32,20$.

Calculate the mean marks.