In a row of 25 students, Sana is 9th from the left. What is her position from the right?
- A. 16th
- B. 17th
- C. 15th
- D. 18th
Explanation
The position from the right is the total minus the position from the left plus one, so 25 minus 9 plus 1 gives 17. Omitting the plus one yields 16, which is the trap in the first option. The formula follows from the same double counting logic as the earlier queue question.
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