[" Mean of "5" observations is "7." If f...

[" Mean of "5" observations is "7." If four of these observations are "6,7,810" and one is missing "],[" then the variance of all the five observations is "],[[" a) "4," b) "6," c) "8," d) "2]]

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[" Mean of "5" observations is "7." If four of these observations are "6,7,810" and one is missing "],[" then the variance of all the five observations is "],[[" a) "4," b) "6," c) "8," d) "2]]

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