3. A candy company distributes boxes of chocolates with a mixture of creams, toffees, and cordials. Suppose that the weight of each box is 1 kilogram but the individual weights of the creams, toffees, and cordials vary from the box to box. For a randomly selected box, Let X and Y represent the weight of the crems and the toffees, respectively, and suppose that the joint density function of these variables is 24xy 0

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