- A29
- B32
- C30
- D31
Step-by-Step Solution
After the swap P takes Q's original place, so Q was 21st from the left. Q is also 11th from the right, giving total = 21 + 11 - 1 = 31.
Answer: D) 31
In a row of people, P is 7th from the left end and Q is 11th from the right end. When P and Q interchange their places, P becomes 21st from the left end. How many people are there in the row?
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