Question

The annual profits earned by 30 shops of a shopping complex in a locality give rise to the following distribution:

Draw both ogives for the above data and hence obtain the median.

Answer 1

More than method:

Now we mark, 

On x-axis lower class limit and on y-axis Cumulative frequency 

Thus, 

we plot graph as: (5,30); (10,28); (15,16); (20,14); (25,10); (30,7); (35,3)

Now we mark the upper class limit on x-axis and the cumulative frequency on y-axis. 

Thus, 

we plot 

the points: (10,2); (15,14); (20,16); (25,20); (30,23); (35,27); (40,30)