If mean and standard deviation of 5 observations \( x_{1} \), \( \m...

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If mean and standard deviation of 5 observations \( x_{1} \),
\( \mathrm{P}^{n} \) \( \mathrm{x}_{2}, \mathrm{x}_{3}, \mathrm{x}_{4}, \mathrm{x}_{5} \) are 10 and 3 , respectively, then the

W. variance of 6 observations \( x_{1}, x_{2}, \ldots ., x_{5} \) and -50 is equal to
(1) 582.5
(2) 507.5
(3) 586.5
(4) 509.5
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