4. Of nine executives in a business firm, four are married, three have never mar

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4. Of nine executives in a business firm, four are married, three have never married and two are divorced. Two of the executives are to be selected for promotion. Let X denote the number of divorced executives and Y denote the number of never married executives among the two selected for promotion. Assuming that the two are randomly selected from the nine available. Assuming that the two are a. construct a joint probability table, b. find marginal probability mass functions of Xand Y. c. calculate p(x + y

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4. Of nine executives in a business firm, four are married, three have never married and two are divorced. Two of the executives are to be selected for promotion. Let X denote the number of divorced executives and Y denote the number of never married executives among the two selected for promotion. Assuming that the two are randomly selected from the nine available. Assuming that the two are a. construct a joint probability table, b. find marginal probability mass functions of Xand Y. c. calculate p(x + y

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