The question asks about a device used to print addresses on various items such as envelopes, wrappers, and newspapers. Let's analyze each of the given options to identify the correct one.
Based on the analysis, the correct answer is the Addressing Machine.
An addressing machine facilitates bulk mailing processes by quickly and efficiently printing standardized addresses, thus saving time and reducing human error in manual addressing.
Find the unknown frequency if 24 is the median of the following frequency distribution:
\[\begin{array}{|c|c|c|c|c|c|} \hline \text{Class-interval} & 0-10 & 10-20 & 20-30 & 30-40 & 40-50 \\ \hline \text{Frequency} & 5 & 25 & 25 & \text{$p$} & 7 \\ \hline \end{array}\]