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MathSofiya

  • 3 years ago

A=student is female B=student is majoring in Business The probability a business major is female P(B|A) The probability a female student is majoring in business P(A|B) correct?

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  1. CliffSedge
    • 3 years ago
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    Ermm, I think those are backwards, actually. B|A is read, "of B given A."

  2. MathSofiya
    • 3 years ago
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    elaborate. My book agrees with you, but I still don't understand why I'm wrong.

  3. CliffSedge
    • 3 years ago
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    For "The probability a business major is female" - you're looking for the probability of being female. That the person is a business major is already given.

  4. MathSofiya
    • 3 years ago
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    "The probability a business major is female" -given: person is a business major so B is given Therefore I say of "female" given "business major"

  5. MathSofiya
    • 3 years ago
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    hhhmm....I guess that makes sense.

  6. CliffSedge
    • 3 years ago
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    Yep, these are called 'conditional probabilities;' you need to determine what the given condition is and that goes after the |.

  7. MathSofiya
    • 3 years ago
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    Thank you!

  8. CliffSedge
    • 3 years ago
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    You're quite welcome.

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