4. There are 3 balls in an urn with the numbers 1,2,3 written on them. One draws two balls without replacement. Let X an
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4. There are 3 balls in an urn with the numbers 1,2,3 written on them. One draws two balls without replacement. Let X an
4. There are 3 balls in an urn with the numbers 1,2,3 written on them. One draws two balls without replacement. Let X and Y be the numbers written, respectively, on the first and on the second drawn balls. Find the covariance and the correlation of X and Y.
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