In aid of charity, every student in a class contributes as many rupees as the number of students in that class. With the additional contribution of Rs. 2 by one student only, the total collection is Rs. 443. Then how many students are there in the class ?
A
12
B
21
C
43
D
45
Correct Answer: Option B
Explanation
Let's assume the number of students in the class is 'n'. The problem states that each student contributes as many rupees as the n