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Algebra2

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IF P(A)=40%,P(A OR B)=60%,P(A AND B)=30% WHAT IS P(B)

  • Algebra2 - ,

    P(A or B) = P(A) + P(B) - P(A and B)

    everything except P(B) is given
    sub in the values, make sure to change the percents to decimals
    e.g. 60% = .6

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