How Many Person in the Row? If
Answer: (4) 19
In a row A is 7th from the left and B is 9th from the right. If both interchange their place.
Then, A become 11th from the left.
————————à7 3 9 ß————————
Number of persons in a row.
7 + 3 + 9 = 19
Hence, the number of person is 19 in a row.