The Median of Grouped Marks

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The Median of Grouped Marks

CBSE Class 10 · Solve it one decision at a time. A wrong pick earns a nudge, never the answer.

Step 1 of 4

The problem

The table gives the marks of 50 students in a test. Find the median marks.
MarksStudents0–10310–20720–302030–401240–508\begin{array}{|c|c|}\hline \text{Marks} & \text{Students} \cr\hline 0\text{–}10 & 3 \cr\hline 10\text{–}20 & 7 \cr\hline 20\text{–}30 & 20 \cr\hline 30\text{–}40 & 12 \cr\hline 40\text{–}50 & 8 \cr\hline\end{array}

Step 1 · Your move

Add up the frequencies from the first class. What is the cumulative frequency up to and including the class 30–40?

N=50,N = 50,N2=25\quad \dfrac{N}{2} = 25
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