In a row of people, A is 7th from the left and B is 9th from the right. If they interchange their positions, A becomes 13th from the left. How many people are there in the row?
Q1. In a row of people, A is 7th from the left and B is 9th from the right. If they interchange their positions, A becomes 13th from the left. How many people are there in the row?
Answer: 21
Explanation: A is 7th from the left, and after interchanging, A is 13th from the left. The difference (13-7 = 6) added to B's original position from the right gives the total count. So, 9 + 6 + 6 = 21.