Question

In a row of students, A is at the 9th place from the left and B is at the 5th place from the right. If A and B interchange their places, A will be at the 18th place from the left. At what place from the right will B be?

• A. 14
• B. 9
• C. 5
• D. 18
• E. None of the above

Answer 1

The correct option is A 14

As the place of A is changed by 18 -9 = 9
Similarly the place of B is changed by = 5 + 9 = 14 from the right.
Total no. of students = 18 + 5 - 1 = 24
(As A is at the ${18}^{th}$ place from left after interchanging with the place of B and also $5^{th}$ from the right).
Hence, the place of B from the right after interchanging = 22 - 9 + I = ${14}^{th}$.

Hence, the required answer is (1).