The following table shows the weekly wages paid to workers in a factory:

Weekly wages(in $₹$)	$600-700$	$700-800$	$800-900$	$900-1000$	$1000-1100$	$1100-1200$	$1200-1300$	$1300-1400$
Number of workers	$8$	$12$	$20$	$20$	$16$	$14$	$8$	$2$

What is the lower limit of the class interval with least frequency?

The following table shows the weekly wages paid to workers in a factory.

What is the class mark of the lowest class interval?

The following table shows the weekly wages paid to workers in a factory.

Answer the following question:

How many workers are considered in all?

The following table shows the weekly wages paid to workers in a factory.

How many workers got less than $₹900$ as their weekly wages?

A bureau's annual expenditures for the years $2007-2011$ are shown in the following table.

Equipment, supplies and salaries were the only three categories on which the bureau spent money. Study the bar graph and answer the following question.
In $2009$ the bureau has $123$ employees. If $20$ of the employees earned an average annual salary of $₹ 8000$ and the average annual salary of the other $103$ employees is $₹k$, then find the value of $k$.

A bureau's annual expenditures for the years $2007-2011$ are shown in the following table.

Equipment, supplies and salaries were the only three categories on which the bureau spent money. Study the bar graph and answer the following question.
If there were $100$ employees in the bureau in $2010$ and the average salary paid to the employees in that year was $₹k$, then what is the value of $k$.

A bureau's annual expenditures for the years $2007-2011$ are shown in the following table.

Equipment, supplies and salaries were the only three categories on which the bureau spent money.

Of the bureau's expenditure for the equipment in $2011$, one-third was used for the purchase of mailroom equipment and the remainder was spent on miscellaneous office equipment. If the bureau spend $₹k$ on miscellaneous office equipment in $2011$, then find the value of $k$.