Question 1
In a queue, Lata is 19th from the front and Nisha is 19th from the back. If there are 25 people in the queue, how many people are standing between Lata and Nisha?
Overlapping case because r1 + r2 = 38 > total 25. Between B = (r1 + r2) - total - 2 = 38 - 25 - 2 = 11.