In a row of girls, Rama is 10th to the left of Radha and Radha is 17th from the right end. Sheela is 4th from right of Rama. If Sheela is 10th from the left end, then how many girls are there in the row ?

The correct answer is (B) 32.

Step-by-step derivation:

• Radha's position: 17th from the right end.
• Rama's position: Rama is 10th to the left of Radha, so Rama is $(17 + 10) = 27$$\text{th}$ from the right end.
• Sheela's position: Sheela is 4th to the right of Rama, so Sheela is $(27 - 4) = 23$$\text{rd}$ from the right end.
• Total girls in the row: Sheela is also given as 10th from the left end.
• Using total formula: $\text{Total}=(\text{Left position}+\text{Right position})-1=(10+23)-1=32$$\text{Total}$ = ($\text{Left position}$ + $\text{Right position}$) - 1 = (10 + 23) - 1 = 32.