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Thread: Conditional Probability - Exam

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    Unhappy Conditional Probability - Exam




    Someone can help me please, I need to understand them for my exam on Monday in next week. Today is Saturday.....Thanks a lot.....

    USING AND INTERPRETING CONCEPTS

    1. BRCA gene
    In the general population, one woman in eight will develop breast cancer.
    Research has shown that one woman in 250 carries a mutation of the BRCA gene. Eight out of 10 women with this mutation develop breast cancer.

    (a) Find the probability that a randomly selected woman will develop breast cancer given that she has a mutation of the BRCA gene.

    (b) Find the probability that a randomly selected woman will carry the mutation of the BRCA gene and will develop breast cancer.

    2. Assisted Reproductive Technology
    Astudy found that 24% of the assisted repoductive technology (ART) cycles resulted in a pregnancy. Seven percent of the ART pregnancies resulted in multiple births.

    (a) Find the probability that a randomly selected ART cycle resulted in a pregnancy and produced a multiple birth.

    (b) Find the probability that a randomly selected ART cycle resulted in a pregnancy did not produced a multiple birth.

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    1(a) this is given in the problem - 80%
    (b) (1/250) * (8/10)

    2(a) .24 * .07
    (b) .24 * .93

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