Solved: What is the pmf of the number of granite specimens, Basic Statistics

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What is the pmf of the number of granite specimens

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Q: A geologist has collected 10 specimens of basaltic rock and 10 specimens of granite. The geologist instructs a laboratory assistant to randomly select 15 of the specimens for analysis.

a. What is the PMF of the number of granite specimens selected for analysis?

b. What is the probability that all specimens of one of the two types of rock are selected for analysis?

c. What is the probability that the number of granite specimens selected for analysis is within 1 of its mean or expected value? Hint: First find E(X).

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Basic Statistics: What is the pmf of the number of granite specimens

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