Bar Charts and Histograms

refer the table below and answer the following questions related to the table
The table below has given quarterly statistics on the country's Food grain supply, in '000 tonnes, from the four geographic regions. When the supply from the four geographic regions is unable to meet the consumption demand, the go downs stocks are used to make good the shortfall.
(Figure in the table are in '000 tonnes.)

Study the table and answer the following question.

The frequency distribution of the daily income of $550$ workers of a factory is given below:

What is the size of class intervals?

Directions: Study the following histogram and answer the following questions.


The percentage of population (approximately) in the age group of $40-45$ is:

Directions: Study the following histogram and answer the following questions.


The ratio of the number of persons between the age group of $20-25$ and $30-35$ is :

Which of the graphs is a bar graph and histogram.

What is the difference between histogram and bar graph.

Represent the following data by means of histogram.

In histogram, the _____ of each bar represents the value whereas in bar chart the _____ of each bar represents the values that they represent.

In a factory, there are $39$ workers who have been categorised into five groups ($A, B, C, D, E$) on the basis of the range of their daily wages (in multiples of $₹100$). The distribution is presented through a Histogram shown below:

What is the ratio of the number of employees whose daily wages are $₹200$ or more but less than $₹400$ to that of the number of employees whose daily wages are $₹400$ or more but less than $₹600$?

The mode of the data $12, 1, 10, 1, 9, 3, 4, 9, 7, 9$ is:

Data about the times, in seconds, taken to run $100$ metres by $n$ adults are given in the following table.

By first investigating the possible values of $a$ and of $b,$ find the largest possible value of $n,$ given that the modal class contains the slowest runners.

Four classes of continuous data are recorded as $1-7, 8-16, 17-20$ and $21-25.$ The class $1-7$ has a frequency of $84$ and there is no modal class. Find the total frequency of the other three classes.

A railway line monitored $15\%$ of its August train journeys to find their departure delay times. The results are shown below. It is given that $24$ of these journeys were delayed by less than $2$ minutes.

Find the total number of journeys provided in August.

A railway line monitored $15\%$ of its August train journeys to find their departure delay times. The results are shown below. It is given that $24$ of these journeys were delayed by less than $2$ minutes.

Calculate an estimate of the number of these journeys that were delayed by:
$10$ to $15$ minutes.

The masses, $m$ grams, of $690$ medical samples are given in the following table.

The histogram shows the lengths of $26$ black rats.

The modal class is

Height in cms:$\begin{array}{cccc}60-62 63-65& 66-68& 69-71& 72-74\end{array}$
No. of students: $\begin{array}{ccccc}15& 118& 142& 127& 18\end{array}$

Modal group is

Coronavirus disease (COVID$-19$) is an infectious disease caused by the SARS-CoV$-2$ virus.

Most of the people who got infected with this virus have experienced mild to moderate respiratory illness and recovered soon. But, some people have become seriously ill and required medical attention. Older people who have other medical conditions like diabetes, chronic respiratory disease, or cardiovascular disease etc. will be infected easily and develop serious illness. Anyone, at any age, can get sick with Coronavirus and become seriously ill or die.

During a survey, the ages of patients who are infected and admitted in a city hospital are recorded. The data is represented using the histogram as show below:

The class width of the given data is

Coronavirus disease (COVID$-19$) is an infectious disease caused by the SARS-CoV$-2$ virus.

Most of the people who got infected with this virus have experienced mild to moderate respiratory illness and recovered soon. But, some people have become seriously ill and required medical attention. Older people who have other medical conditions like diabetes, chronic respiratory disease, or cardiovascular disease etc. will be infected easily and develop serious illness. Anyone, at any age, can get sick with Coronavirus and become seriously ill or die.

During a survey, the ages of patients who are infected and admitted in a city hospital are recorded. The data is represented using the histogram as show below:

The age group of the highest number of patients infected by Covid$-19$ is

Study the graph carefully and answer the given question.
The graph shows the Demand and Production statistics of the five companies.

What is the difference between the average demand and the average production of five companies taken together?