A) 0
B) - 1
C) 1
D) 2
Correct Answer: A
Solution :
(a): \[\overline{X}=\frac{\sum{{{f}_{i}}{{x}_{i}}}}{n}\] \[\sum{\left( {{f}_{i}}{{x}_{i}}-\overline{x} \right)}=\sum{{{f}_{i}}{{x}_{i}}-\sum{\overline{x}}}\] \[=n\overline{x}-n\overline{x}\]= 0You need to login to perform this action.
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