Estimate the median and mode of the following data :

Wages $\left(₹\right)$	Number of workers
Less than $10$	$3$
Less than $20$	$12$
Less than $30$	$27$
Less than $40$	$57$
Less than $50$	$75$
Less than $60$	$80$

The following table shows the distribution of the heights of a group of workers in a factory:

Convert the distribution to more than cumulative frequency distribution and draw its ogive. Hence, obtain the median from the graph.

Attempt this question on a graph paper. The table shows the distribution of the marks obtained by $160$ students in a test:

Construct more than type cumulative frequency table and draw its ogive. From the ogive, determine the median marks.

$100$ students in a school have heights as tabulated below:

Draw the ogive for the above data and from it determine the median (use graph paper.)

Draw an ogive for the following data:

Estimate the median from your graph.

The table shows the frequency distribution of $\mathrm{weights}$ of $80$ apples selected at random from a big consignment.

Draw both cumulative (less than) and cumulative (more than) ogives on a graph paper and determine the median $\mathrm{weight}$ of apples from the point of intersection of these two curves.

The annual profits earned by $30$ shops of a shopping complex in a locality give rise to the following distribution.

Draw both ogives for the above data.Hence, obtain median profit.

Draw less than ogive and more than ogive for following distribution giving $400$ telephone calls according to their duration in seconds.

Hence, find the median of the distribution and verify it by using formula. Also find ${\mathrm{Q}}_1,{\mathrm{Q}}_{3,}{\mathrm{D}}_9,{\mathrm{P}}_4\text{ and }{\mathrm{P}}_{40}$ from graph.