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6) Suppose that a class of 15 students is assigned to write an essay. Suppose 3 essays are picked at random. How many groups of

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6) Suppose that a class of 15 students is assigned to write an essay. Suppose 3 essays are picked at random. How many groups of 3 are possible? What if the 3 essays picked at random are given awards of $20, $10, and $5. How many groups of 3 are possible now? Chapter Five 7) Find the Mean of the following Probability Distribution Houses Sold Probability .14 .15 .10 .11 .11 .15 24

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