The area of histogram of a data and its frequency polygon is the same. Reason how.

The cumulative frequency of the class $20-30$ of the above frequency distribution is _____.

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? 

Find the value of $x$ in following table.

The table below shows, children of a class sorted according to their marks in an examination.

If we arrange the children from the one with the least mark to the one with the greatest, then what will be the assumed mark of the ${12}^{\text{th}}$ student?

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 given table represents the exports (in ₹ crores) of four items A, B, C and D over a period of six years. Study the table and answer the question that follows.

In which year, the exports of item $\mathrm{D}$ were $1.4 \mathrm{times}$ the average exports of item $\mathrm{B}$ during six years;

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 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 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)

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:

The given table represents the exports ( in$₹$crores) of four items $\mathrm{A}, \mathrm{B}, \mathrm{C}$ and $\mathrm{D}$ over a period of six years. Study the table and answer the question that follows:

The total exports of item $\mathrm{A}$ from $2012$ to $2014$ is what percentage less than the total exports of all the four items in $2015$:(Correct to one decimal place)

The following table gives the frequency of vowels used in the page of a book.