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Please show all your steps and make your explanation clear. Thanks! 6. Doggies and Koalas (10 points) Suppose that 471 animals are partitioned into pairs

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6. Doggies and Koalas (10 points) Suppose that 471 animals are partitioned into pairs at random, with each partition being equally likely. If the set consists of n doggies and 3n koalas, what is the expected number of doggiekoala couples

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