Marks obtained by 70 students are given below :
\begin{tabular}{|l|c|c|c|c|c|c|c|}
\hline Marks ...
Marks obtained by 70 students are given below :
\begin{tabular}{|l|c|c|c|c|c|c|c|}
\hline Marks & 20 & 70 & 50 & 60 & 75 & 90 & 40 \\
\hline No. of students & 8 & 12 & 18 & 6 & 9 & 5 & 12 \\
\hline
\end{tabular}
Calculate the median marks.
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