Question

The distances covered by 250 public transport buses in a day is shown in the following frequency distribution table. Find the median of the distances.

Distance (km)	200-210	210-220	220-230	230-240-	240-250
No. of buses	40	60	80	50	20

Answer 1

Cumulative frequency which is just greater than (or equal) to 125 is 180. 

∴ The median class is 220 – 230. 

Now, L = 220, f = 80, cf = 100, h = 10

∴ The median of the distances is 223.13 km (approx.)