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Class: 0-10 & 10-20 & 20-30 & 30-40 & 40-50 Frequency: 12 & 28 & 32 & 25 & 13FIND MEAN BY USING DIRECT METHOD. |
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Answer»
\(\therefore\) Mean = \(\frac{\Sigma x_if_i}{\Sigma x_i}=\frac{2740}{125}\) = 21.92 |
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