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What is the probability that at least 3 of the 5 trees

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For experimental purposes, a researcher is sent out to measure 5 Douglas-firs in an Interior sample plot which is known to contain 10 Douglas-fir and 15 Hemlock trees. Unfortunately, the researcher has not had a Dendrology course and is not very good at distinguishing between species, so he randomly samples 5 different trees (without replacement). What is the probability that at least 3 of the 5 trees that he measures are really Douglas-firs?

Reference no: EM132155904

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