Comprehension Passage
Directions: Study the following information and answer the given questions:
Band and Bob are standing in a row, where Band is 18th from the left end of the row and Bob is 24th from the right end of the row. If both of them interchange their positions, then Band becomes 30th from the left end.
How many persons are standing between Band and Bob?
1
9
2
10
3
11
4
8
5
Cannot be determined