A group of students decided to collect as many paise from each member of group as is the number of members. If the total collection amounts to Rs. 51.84, the number of the member is the group is:
Pick:
A) 57
B) 67
C) 72
D) 87
E) 97

Rationale: "explanation : money collected = ( 51.84 x 100 ) paise = 5184 paise . ∴ number of members = √ ( 5184 ) = 72 . answer : c"
Answer: C