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Statistics

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1. Each of 4 people is presented with gourmet coffee and ordinary coffee and asked to identify the gourmet coffee. None of the 4 can really tell the difference and are merely guessing.

a. What is the probability that exactly 2 of the 4 correctly identify the gourmet coffee?








b. What is the probability that at least 2 of the 4 correctly identify the gourmet coffee?




c. What is the probability that at most 1 out of the 4 correctly identify the gourmet coffee?

  • Statistics - ,

    Use a binomial probability table or a formula like the following:

    P(x) = (nCx)(p^x)[q^(n-x)]

    For a): Find P(2)
    For b): Find P(2), P(3), and P(4). Add together for your probability.
    For c): Find P(0) and P(1). Add together for your probability.

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