In a row of girls facing north, Ruchi is 9th from the left end and Sonam is 8th from the right end. They exchange their places. Now Ruchi is 5th to the right of Tara, who is 13th from the left end. What was Ruchi’s position from the right end before the exchange?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → 17th
After the exchange, Ruchi stands in Sonam’s old place, which is 8th from the right. Tara gives the same place counted from the left.
Ruchi is now 5th to the right of Tara: \(13+5=18\)th from the left
This place is also 8th from the right
Girls in the row \(=18+8-1=25\)
Before the exchange Ruchi was 9th from the left
Her position from the right then \(=25-9+1=17\)th
