The heights of the students of a school (measured to the nearest $\mathrm{cm}$) were recorded as under.

Height (in $\mathrm{cm}$)	$150$	$155$	$158$	$160$	$164$	$168$
Number of students	$10$	$15$	$8$	$14$	$7$	$16$

If the mean height obtained by using the deviation method is $k \mathrm{cm}$, find $k$.

The mean of the following data is $18.75$. Find the value of $p$.

Calculate the mean of the scores of $20$ students in a mathematics test:

If the mean of the scores is $k$ marks, find $k$.

Consider the following distribution of daily wages of $50$ workers of a factory:

Find the mean daily wages of the workers of the factory by using the deviation method. If the answer is $₹k$, find $k$.

The table below shows the daily expenditure on food of $25$ households in a locality. Find the mean daily expenditure on food. If the answer is $₹k$, find $k$.

An aircraft has $120$ seats. The number of seats occupied during $100$ flights is given in the following table:

If the mean number of seats occupied over the flights is $k$, find $k$.

A class teacher has the following absentee record of $40$ students of a class for the whole term. If the mean number of days a student was absent is $k$, find $k$.

Find the mean of the following data:

The frequency distribution table of an agricultural holding in a village is given below:

If the mean area held by a family is $k$ hectares, find $k$.