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Our best and brightest are here to help you succeed in the classroom. What is the probability that the first born will inherit the gene that cause Huntington's disease? I know the answer is 25% according to my answer key, but I cannot understand why. Come to Rational-equations. Choose the one alternative that best completes the statement or answers the question. A student picks a raffle ticket from a box and then picks a second raffle ticket without replacing the first raffle ticket. Suppose X is a random variable with mean µ. - have the students mark and correct any questions they may have gotten wrong (gardner: intrapersonal). The committee cannot do business if more than 3 members are absent. For example, if a student is selected at random from a class, find the probability that Jane will be selected and the probability that a girl will be selected. The PDF resources below are password protected. Sarah is playing The Game of Life. 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