If the mode of the observations $5, 6, 8, 9, 6, 7, 8, 9, 4, 5, 8, 9, x$ and $10$ is $9$,then $x = $ ............

The frequency distribution is given below:

Marks	$0-20$	$20-40$	$40-60$	$60-100$
Number of Students	$10$	$15$	$20$	$25$

This distribution has been represented graphically as shown in the image. Is this representation correct? Explain.

Prepare a continuous grouped frequency distribution from the following data:

Mid-point	Frequency
$5$	$4$
$15$	$8$
$25$	$13$
$35$	$12$
$45$	$6$

Also,find the size of the class intervals.

Expenditure on education of a country during a five-year period $(2002-2006)$,in crores of rupees,is given below:

Elementary education	$240$
Secondary education	$120$
University education	$190$
Teacher's training	$20$
Social education	$10$
Other educational programmes	$115$
Cultural programmes	$25$
Technical education	$125$

Represent the information above by a bar graph.

Is it correct to say that in a histogram,the area of each rectangle is proportional to the class size of the corresponding class interval? If not,correct the statement.

The weights (in $kg$) of $11$ students are given below:
$37, 42, 40, 39, 41, 35, 37, 36, 40, 40, 42$
Find the median of the data.