Q170
ReasoningSeating Arrangement, Ranking & Puzzles
In a row, 'A' is in the 11th position from the left and 'B' is in the 10th position from the right. If 'A' and 'B' interchange, 'A' becomes 18th from the left. How many persons are there in the row other than 'A' and 'B'?
- a.27
- b.26
- c.25
- d.24
Answer: (C) 25
After the swap, A's new position (18th from left) equals B's original position, so B was originally 18th from left, meaning the row has (10 + 18 - 1) = 27 people in total, or 25 excluding A and B.