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Q.

The mean deviation (approximately) from the mode for the data, is 20, 25, 30, 18, 15, 40

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a

6.71

b

4.52

c

7.61

d

5.33

answer is C.

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Detailed Solution

We have,Mean =20+25+30+18+15+406=1486Median =20+252=452∴ Mode = 3 Median -2 Mean =1352−1483=1096Hence, mean deviation about mode is given by 20−1096+25−1096+30−1096+18−1096+15−1096+40−10966 M.D. =11+41+71+1+19+13136=27436=7.61

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