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algebra 11

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At Joseph Middle School, the probability that a boy takes English and Science is 0.087. The probability that a boy takes English is 0.68. What is the probability that a boy takes Science given that the boy is taking English?

  • conditional probability - ,

    The conditional probability of S given E is
    P(S|E)=P(S∩E)/P(E)
    Here
    P(S∩E)=0.087
    P(E)=0.68
    So
    P(S|E)=0.087/0.68=0.128 (approx.)

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