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    Probability of selecting blood type A+

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    1. The distribution of blood types for 100 Americans is listed in the table. If one donor is selected at random, find the probability of selecting with blood type A+.

    blood type O+ O- A+ A- B+ B- AB+ AB-
    number 37 6 34 6 10 2 4 1

    A. 0.45
    B. 0.34
    C. 0.68
    D. 0.4

    The P(A) = 3/5. Find the odds in favor of A.

    A. l2:5
    B. 2:3

    A group of students were asked if they carry a credit card. The responses are listed in the table.

    Class Credit Card carrier Not a Credit Card Carrier Total
    Freshman 18 42 60
    Sophomore 40 0 40
    Total 58 42 100

    If a student is selected at random, find the probability that he or she owns a credit card given that the is a sophomore. Round your answer to three decimal places.

    A. 0.000
    B. 0.400
    C. 1.000
    D. 0.690

    Uses Bayes theorem to solve this problem A storeowner purchases steroes from two companies. From Company A, 550 stereos are purchased and 1% are found to be defective. From Company B, 850 stereos are purchased and 6% are found to be defective. Given that a stereo is defective, find the probability that it came from Company A.

    A. 11/113
    B. 17/113
    C. 102/113
    D. 66/113

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    Solution Summary

    The solution provides answers to multiple choice questions on probability.