32
94
52
3
Correct answer is B
xffxˉx−x(ˉx−x)2f(ˉx−x)2122−248212−111326000414111221024882418
x = ∑fx∑f
= 248
= 3
Variance (62) = ∑f(ˉx−x)2∑f
= 188
= 94
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