The mean of $35$ observations is $42$. Find the sum of those observations $\left(\Sigma f_{i} x_{i}\right)$.

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.

After arranging the observations in ascending or descending order,the observation which is obtained in the middle is called .............. of the data.

Let $m$ be the mid-point and $l$ be the upper class limit of a class in a continuous frequency distribution. The lower class limit of the class is:

The class mark of the class $90-120$ is:

$30$ children were asked about the number of hours they watched $TV$ programmes last week. The results are recorded as under:

Number of hours	$0-5$	$5-10$	$10-15$	$15-20$
Frequency	$8$	$16$	$4$	$2$

Can we say that the number of children who watched $TV$ for $10$ or more hours a week is $22$? Justify your answer.