WBCS.LIVE practice question

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, then ‘A’ becomes 18th from the left. How many persons are there in the row other than ‘A’ and ‘B’?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 27
  2. 26
  3. 25
  4. 24

Correct answer and explanation

Correct answer: 25

Explanation: ✅ Correct Answer: C) 25 📚 Explanation: A is 11th from left and B is 10th from right. After interchange, A's new position (B's old position) is 18th from left. This means there are 17 people to the left of that spot. Total people = 18 + 10 - 1 = 27. Since the question asks for people 'other than' A and B, we subtract 2 from the total. Thus, 27 minus 2 equals 25.