Find \( \operatorname{Cov}(\mathrm{X}, \mathrm{Y}) \) between \( x ...
Find \( \operatorname{Cov}(\mathrm{X}, \mathrm{Y}) \) between \( x \) and \( y \) when \( \Sigma x_{i}=50, \Sigma y_{i}=30, \Sigma x_{i} y_{i}=-115 \) and \( n=10 \).
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