Draw the frequency polygon for the following data

Class Interval	10-20	20-30	30-40	40-50	50-60	60-70	70-80	80-90
Frequency	4	6	8	10	12	14	7	5

Study the graph and answer the question,

The number of workers in the factory whose daily wages are $₹450$ or more but less than $₹600$ is:

Study the given histogram that shows the marks obtained by students in an examination and answer the question that follows.

The number of students who obtained less than $250$ marks is what per cent more than the number of students who obtained $400$ or more marks? (Correct to one decimal place)

The given graph shows the marks obtained by the students in an examination.

The numbers of students who obtained less than $300$ marks is what percent more than the number of students who obtained $350$ or more marks? 

Study the given histogram that shows the marks obtained by students in an examination and answer the question that follows,

The number of students who obtained less than $250$ marks is:

The pie-chart represented below shows the spending by a family on various items during the year $1999$. Study the pie-chart carefully and answer the following question:

If the total expenditure of the family for the year $1999$ was $₹46000$, then the savings (in rupees) of the family was

Study the given histogram that shows the marks obtained by students in an examination and answer the question that follows.

The number of students who obtained less than $350$ marks is what per cent more than the number of students who obtained $400$ or more marks? (correct to one decimal place)

The given graph shows the weights of students in a school on a particular day.

The number of students weighing less than $50 \mathrm{kg}$ is what percent less than the number of students weighing $55 \mathrm{kg}$ or more?

Study the graph and answer the question.

The number of workers in the factory whose weekly earning are $₹5,500$ or more but less than $₹7,500$ is:

The pie-chart represented below shows the spending by a family on various items during the year $1999$. Study the pie-chart carefully and answer the following question:

The ratio of the total amount of money spent on housing to the total amount of money spent on education was

The pie-chart represented below shows the spending by a family on various items during the year $1999$. Study the pie-chart carefully and answer the following question:

According to the pie-chart, the maximum amount was spent on which item?

The given histogram shows the frequency distribution of the speed of cars passing through at a particular spot on a highway. Study the graph and answer the questions that follows:

What percentage of cars were running with a speed of less than $70 \mathrm{km}/\mathrm{h}$?

The pie-chart represented below shows the spending by a family on various items during the year $1999$. Study the pie-chart carefully and answer the following question:

If the total amount spent during the year $1999$ was $₹46000$ then how much money (in rupees) was spent on clothing and housing together?

The given histogram shows the frequency distribution of the speed of cars passing through a particular spot on a highway. Read the graph and answer the following question.

What is the ratio of the number of cars with speed less than $60 \mathrm{kmph}$ to the number of cars with speed more than $70 \mathrm{kmph}$?

Study the given histogram that shows the marks obtained by students in an examination and answer the question that follows.

If the total marks obtained by students be represented as a pie chart, then the central angle corresponding to marks $250$ or more but less than $300$, is _____. (Correct to the nearest degree)

The given histogram shows the frequency distribution of the speed of cars passing through a particular spot on a highway. Read the graph and answer the following question.

What percentage of cars were running with the speed of $90 \mathrm{kmph}$ and above?

Using graph paper, draw a histogram for the given distribution showing the number of runs scored by $50$ batsmen. Estimate the mode of the data:

Draw a histogram for the given data using a graph paper:

Estimate the mode from the graph.

Study the given histogram that shows the marks obtained by students in an examination and answer the question that follows.

If the total marks obtained by students be represented as a pie chart, then the central angle of the sector representing marks $200$ or more but less than $300$, is _____. (Correct to the nearest degree)

The pie-chart represented below shows the spending by a family on various items during the year $1999$. Study the pie-chart carefully and answer the following question:

If the total amount spent during the year $1999$ was $₹46000$, then the amount (in rupees) spent on food was