| List-I | List-II |
|---|---|
| (A) The Middle Office | (I) Involved in administration but without being seen by customers |
| (B) Office Automation | (IV) Aims to reduce paperwork and speed up business operations |
| (C) Virtual Office | (II) Office without physical space and facilities |
| (D) Back Office | (III) A part of the operations division of the business unit |
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]