How many students are there in the group, if the total contribution made by the group was ₹ $2876\frac{1}{2}$and each student contributed ₹ $261\frac{1}{2}$?

Given:
 

The amount contributed by each student = ₹ $261\frac{1}{2}$.
 

The total amount collected = ₹ $2876\frac{1}{2}$.

Thus, the total number of students

= Total Contribution ÷ Contribution per Student

= $2876\frac{1}{2}÷261\frac{1}{2}$

= $\frac{5753}{2}÷\frac{523}{2}$

= $\frac{5753}{2}\times \frac{2}{523}$

= $\frac{5753}{523}$

= $11$

Therefore, the number of students in the group is 11.