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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

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 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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