Having clause is used to further filter those groups of records which will be generated through group by clause.
For example:
Select max(marks) from student group by classes having classes in (10,12);
Above...
Correct option is (A) \(A + \frac{\sum f_i \, d_i}{\sum f_i}\)
\(A + \frac{\sum f_i \, d_i}{\sum f_i}\) is a formula to find the mean for a grouped data.
