CA Foundation · Quantitative Aptitude · Seating Arrangements
People sit in a single row, all facing north. Kiran is 9th from the left end and Lata is 17th from the right end. After Kiran and Lata exchange their seats, Kiran is 15th from the left end. How many people are in the row?
The row has 31 people. Kiran's new position is Lata's original seat, which is 15th from the left. Lata is also 17th from the right, so the total is 15 + 17 - 1 = 31, because Lata is counted in both numbers.
- A24
- B30
- C31Correct
- D32
Explanation
After the exchange, Kiran is in Lata's original seat, so Lata was originally 15th from the left. She is also 17th from the right. Total = 15 + 17 - 1 = 31. The option 32 forgets to subtract 1 for counting Lata twice.
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