Find the correlation coefficient of x and y

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Reference no: EM13255081

Let X be a zero-mean random variable having a variance of 9 and let Y be another zero-mean random variable. The sum of X and Y has a variance of 29 and the difference of X and Y has a variance of 21.

(a) Find the variance of Y.

(b) Find the correlation coefficient of X and Y.

Reference no: EM13255081

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