pLEASE help me with this comprehension
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Please find below the solution to the asked query:

$$\begin{gathered} 29. \\ \mathrm{The} \mathrm{most} \mathrm{appropriate} \mathrm{measure} \mathrm{would} \mathrm{be} \mathrm{median} \mathrm{since} \mathrm{there} \mathrm{are} \mathrm{extreme} \mathrm{values}. \\ \begin{array}{ccccccc}\mathrm{Staff}& 1& 2& 4& 5& 6& 2\\ \mathrm{Salary}& 15000& 10000& 7000& 12000& 90000& 95000\end{array} \\ \mathrm{Arranging} \mathrm{it} \mathrm{in} \mathrm{increasing} \mathrm{order} \mathrm{we} \mathrm{get}: \\ 7000 7000 7000 7000 10000 10000 12000 12000 12000 12000 12000 15000 90000 90000 90000 90000 90000 90000 95000 95000 \\ \mathrm{now} \mathrm{we} \mathrm{have} \mathrm{total}=20 \mathrm{values} \\ \mathrm{Median} \mathrm{pair}=12000,12000 \\ \mathrm{Hence} \mathrm{median}=\frac{12000+12000}{2}=12000 \\ \mathrm{Ans} \left(\mathrm{D}\right) \\ 30. \mathrm{Looking} \mathrm{at} \mathrm{the} \mathrm{data} \mathrm{sample}, \mathrm{there} \mathrm{are} \mathrm{no} \mathrm{extreme} \mathrm{values} \\ \mathrm{Hence} \mathrm{we} \mathrm{can} \mathrm{use} \mathrm{any} \mathrm{of} \mathrm{the} \mathrm{median} \mathrm{or} \mathrm{mean} \mathrm{for} \mathrm{reprsenting} \mathrm{data}. \\ \mathrm{Ans}. \left(\mathrm{D}\right) \\ 31. \mathrm{Here} \mathrm{we} \mathrm{have} \mathrm{to} \mathrm{find} \mathrm{the} \mathrm{most} \mathrm{common} \mathrm{characteristic}. \\ \mathrm{Hence} \mathrm{answer} \mathrm{would} \mathrm{be} \mathrm{mode}. \\ \mathrm{Ans} .\left(\mathrm{B}\right) \end{gathered}$$

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