Question

In a row of girls, Rita and Monika occupy the ninth place from the right end and tenth place from the left end, respectively. If they interchange their places, Rita and Monika occupy seventeenth place from the right and eighteenth place from the left, respectively. How many girls are there in the row ?

• A. 25
• B. 26
• C. 27
• D. Data inadequate

Answer 1

The Correct Option is D

Rita is in the 9^th place from the right.
Monika is in the 10^th place from the left.

After they interchange places:
⇒ Rita is in the 17^th place from the right.
⇒ Monika is in the 18^th place from the left.

Before interchange:
⇒ Total girls = Position from the left + Position from the right - 1

After interchange:
⇒ Rita's new left position = 18
⇒ Monika's new right position = 17
The total number of girls =18+17−1=34

However, since Rita and Monika occupy different positions and we don't have enough information to reconcile these positions, we cannot definitively determine the total number of girls in the row based on the information provided.

So, the correct option is (D): Data inadequate.