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  1. A

    My professor and I disagree on a test's answer. would love to get a second opinion.

    The question is as follows: " In a certain country: 10% of the families have no children 20% of the families have 1 child 30% of the families have 2 children 40% of the families have 3 children one child is randomly chosen from all the children in the country. X is a random variable whose...