A box has 1 red and 3 blue marbles. Two marble are selected at random (together, without replacement). Let R be the number of reds we get. Let B be the number of blues we get. Compute Cov(R, B).

Q: Help to explain into details. Thank you!    A box has 1 red and 3 blue marbles.Two marble are…

A: The objective of this question is to compute the covariance between the number of red marbles (R)…

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