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    Question

    A basket contains 3 pink, 4 blue and 5 yellow wools. If

    three wools are picked at random, what is the probability that either all are blue or either all are yellow?
    A 1/44 Correct Answer Incorrect Answer
    B 7/110 Correct Answer Incorrect Answer
    C 9/110 Correct Answer Incorrect Answer
    D 3/25 Correct Answer Incorrect Answer

    Solution

    Total possible result = 12C3 = 220 Total number of event n(E) = 4C3 + 5C3 = 4 + 10 = 14 Required probability = `(n(E))/(n(S))` ` `   = `14/220`  = `7/110`

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