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  • 概率統(tǒng)計(jì)題!急

    概率統(tǒng)計(jì)題!急
    A detailed analysis of your credit-worthiness shows that there is a 30% chance of
    company A approving your credit-card application,and a 20% chance of company B
    approving it,and a 50% chance that both companies will approve it.What are
    the chances that at least one of these companies will approve your application?Explain.
    英語人氣:905 ℃時(shí)間:2020-04-21 12:34:35
    優(yōu)質(zhì)解答
    P(A)=0.3
    P(B)=0.5
    P(A and B)=0.5
    P(at least one)=P(A or B)=P(A)+P(B)-P(A and B)=0.3
    但是這道題題目貌似出錯(cuò)了.因?yàn)镻(B)=P(A and B)
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