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B
Nn∑i=1fixi
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C
1Nn∑i=1fixi
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D
n∑i=1(fi(xi)2N)
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Solution
The correct option is C1Nn∑i=1fixi mean of the data = SumofobeservationsNumberofobservations If the data is a grouped data, frequency of each observation denoted by fi and observation by xi, then Mean = 1Nn∑i=1fixi