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Q.

Runs scored by a batsman in 10 innings are: 38, 70,48,34, 42, 55, 63, 46, 54, 44The mean deviation is

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a

8.6

b

6.4

c

10.6

d

9.6

answer is A.

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Detailed Solution

Arranging the given data in ascending order, we have 34,39,42,44, 46, 49, 54, 55, 63,70,Median  M=46+482=47(∴ n = 10, median is the mean of 5th and 6th items)∴  Mean deviation =Σxi−Mn=Σxi−4710=13+9+5+3+1+1+7+8+16+2310=8.6
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Runs scored by a batsman in 10 innings are: 38, 70,48,34, 42, 55, 63, 46, 54, 44The mean deviation is