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If $μ$ is the mean of distribution $(y_{i}, f_{i}), then {Σf}_{i} (y_{i} - μ) =$

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Relative frequency

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Correct option is C

We have, ∑fiyi−μ=∑fiyi−μ∑fi=μ∑fi−μ∑fi=0 ∵μ=∑fiyi∑fi

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Variate x	1	2	3	4	5
Frequency f of x	4	5	y	1	2

If μ is the mean of distribution yi,fi, then Σfiyi−μ=

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If $μ$ is the mean of distribution $(y_{i}, f_{i}), then {Σf}_{i} (y_{i} - μ) =$