The following table shows the classification of percentage of marks of students and the number of students. Draw a frequency polygon from the table.

Result (Percentage)	$30-40$	$40-50$	$50-60$	$60-70$	$70-80$	$80-90$	$90-100$
Number of students	$7$	$33$	$45$	$65$	$47$	$18$	$5$

The age group and number of persons, who donated blood in a blood donation camp is given below. Draw a pie diagram from it.

The marks obtained by a student in different subjects are shown. Draw a pie diagram showing the information.

In a tree plantation programme, the number of trees planted by students of different classes is given in the following table. Draw a pie diagram showing the information.

The following table shows the percentage of demands for different fruits registered with a fruit vendor. Show the information by a pie diagram.

The pie diagram in the given figure shows the proportions of different workers in a town.

If the total workers is $10000$, then how many of them are working in the field of construction?

The pie diagram in the given figure shows the proportions of different workers in a town.

If the total workers is $10000$, then how many of them are working in the field of administration/admin?

The pie diagram in the given figure shows the proportions of different workers in a town.

If the total workers is $10000$, what is the percentage of workers in the field of production?

The annual investments of a family are shown in the given pie diagram.

If the investment in shares is $₹2000$, then the total investment is $₹k$. Find the value of $k$.