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Miles
Lv 5
Miles asked in Science & MathematicsMathematics · 7 years ago

Conditional/Independent Probabilities Question?

The problem is involving sets A and B

Pr[A|B] = 1/3

Pr[A] = 1/20

Pr[B'] = 17/20

How would I go about finding Pr[B|A] and [B|A']? Thanks in advance!

1 Answer

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  • ?
    Lv 6
    7 years ago
    Favorite Answer

    P[AnB]=1/3*3/20=1/20

    Pr[B|A]=1/20*1/20=1/400

    P[BnA']=P[B]-P[AnB]=

    3/20-1/20=1/10

    P[B|A']=1/10//19/20=2/19

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