Question 1
In a queue, Kabir is 15th from the front and Om is 18th from the back. If there are 20 people in the queue, how many people are standing between Kabir and Om?
Overlapping case because r1 + r2 = 33 > total 20. Between B = (r1 + r2) - total - 2 = 33 - 20 - 2 = 11.