In a queue, A is eighteenth from the front while B is sixteenth from the back. If C is twentieth from the front and is exactly in the middle of A and B, then how many persons are there is the queue?

Correct Answer: 47

Explanation:

A is 18th from front and C is 24th
Number of persons between A and C = 6.
Since C is exactly in middle of A and B, so number of persons between C and B = 6.
∴ Number of persons in the queue = (17 + 1 + 6 + 1 + 6 + 1 + 15) = 47.