A club consists of members whose ages are in A.P. The common difference being 3 months. If the youngest member of the club is just 7 years old and the sum of the ages of all the members is 250, then number of members in the club are :	Select the correct option.
A) 18
B) 20
C) 25
D) 26
E) 27
Let, n be the number of members in the club.Then,   250 =(n x [2×7+(n+1)×3/12]) / 2.   n =25.   Hence, the number of members in the club is 25.   Answer : 25
<result>C</result>
A club consists of members whose ages are in A.P. The common difference being 3 months. If the youngest member of the club is just 7 years old and the sum of the ages of all the members is 250, then number of members in the club are :