The mean deviation about median from the data
$340, 150, 210, 240, 300, 310, 320$ is

50

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52.8

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55

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45

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Solution

The correct option is B $52.8$
Arrange in increasing order
150,210,240,300,310,320,340 N=number of data = 7
median (M) =300
The mean deviation about median $= \frac{150 + 90 + 60 + 0 + 10 + 20 + 40}{7} = 52.857$

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