Mean Deviation

If the value of $Q_1=36 and Q_3=48$ then its quartite deviation will be

A student scorecard is as follows:

Calculate the mean deviation for the given data.

Find the mean deviation of the following database:

$3,6,9,10,15,20,25,27,32,40$

Ramesh obtained $54, 67, 76, 87, 45, 70, 49$ marks in an examination. What is the mean absolute deviation of the obtained marks by Ramesh?

There are $9$ terms in a sequence which is in descending order. Its mean value is $90$. If we add $50$ to each term and then each term is divided by $3$, we get a new mean $\mathrm{M}$. What is the difference between $\mathrm{M}$ and the original mean?

At the end of the year, Mahesh analysed his last five-month salary figures. He found the mean and median salary figures as $\mathrm{Rs}. 6 \mathrm{lacs}$ and the only mode salary figure as $\mathrm{Rs}. 8 \mathrm{lacs}$. If all his salaries are in lacs then what is the sum of the highest and the lowest salary earned by him?

If the mean of the first $7$ positive integral multiples of $13$ is denoted by $\mathrm{p}$ and the median of the same numbers is denoted by $\mathrm{q}$, then what is the value of $\mathrm{p}-\mathrm{q}$?

There are $11$ students in a class. Their marks are as follows in an exam- $34, 57, 89, 65, 80, 54, 24, 76, 83, 44, 93$. What is the co-efficient of mean deviation if it is taken from the median?