Find the mean deviation of 20, 30, 25, 40, 35, 50, 45, 40...
Find the mean deviation of 20, 30, 25, 40, 35, 50, 45, 40, 20 and 45
A.
8
B.
9
C.
10
D.
12
Correct answer is B
Mean = ∑fx∑f
= 35010
= 35
= ∑f|d|∑f
= 9010
= 9
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