Question: 7.1 Two construction contracts are to be randomly assigned to one or more of three firms (I, II, and III). A firm may receive more

7.1 Two construction contracts are to be randomly assigned to one or more of three firms (I, II, and III). A firm may receive more than one contract. Let X1 the number of contracts assigned to firm I X2 the number assigned to firm II.

a Find the joint probability distribution for X1 and X2.

b Find the marginal probability distribution for X1.

c Find .

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