Line graph given below shows the total number of ‘COVID–19’ cases registered in AIIMS Delhi on five different days and the number of females ‘COVID-19’ cases out of total registered cases in these five days. Read the data carefully and answer the questions.

If 40% of the total number of male COVID–19 cases registered on Thursday is taken by the males having age above 40 years, then find the difference between total male COVID–19 cases registered on Thursday who are below or equal to 40 years and total female COVID–19 cases registered on that day?

The correct option is 140.

Step 1: Extract data for Thursday from the given line graph.

From the line graph provided:

• Total number of COVID-19 cases registered on Thursday (blue line) = 500

• Total number of female COVID-19 cases registered on Thursday (orange line) = 100

Step 2: Calculate the total number of male COVID-19 cases registered on Thursday.

$\text{Male cases on Thursday}=\text{Total cases}-\text{Female cases}$

$\text{Male cases on Thursday}=500-100=400$

Step 3: Calculate the number of male COVID-19 cases based on age groups.

It is given that 40% of the total male cases on Thursday are above 40 years of age.

Therefore, the percentage of male cases who are below or equal to 40 years of age is:

$100\%-40\%=60\%$

Number of male cases registered on Thursday who are below or equal to 40 years of age:

$=60\%\text{of}400$

$=\frac{60}{100}\times 400=240$

Step 4: Find the required difference.

We need to find the difference between total male COVID-19 cases registered on Thursday who are below or equal to 40 years and total female COVID-19 cases registered on Thursday.

$\text{Required difference}=240-100=140$

Thus, the required value is 140.