The following distribution gives the daily income of 50 workers of a factory


Daily income (in Rs)



100 - 120



120 - 140



140 - 160



160 – 180



180 - 200



Number of workers



12



14



8



6



10



Convert the distribution above to a less than type cumulative frequency distribution, and draw its ogive

The frequency distribution table of less than type graph is as follows:


Daily income (in Rs)


(upper class limits)



Cumulative Frequency



Less than 120



12



Less than 140



26



Less than 160



34



Less than 180



40



Less than 200



50



Now,


Taking upper class interval on x-axis and their respective frequencies on y-axis, ogive will be:



3