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Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 month ago

 The probability that a randomly selected K-12 teacher from a city is a female is 0.68. The probability that the teacher holds a second job.?

Question is:  The probability that a randomly selected K-12 teacher from a city is a female is 0.68. The probability that the teacher holds a second job is 0.34. The probability the teacher is a female and holds a second job is 0.26. Find the probability that a K-12 teacher selected at random from this city is a female OR holds a second job.

I keep getting 1.02. Comes up as wrong. 

1 Answer

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  • Pope
    Lv 7
    1 month ago

    Define two events.

    F: The teacher is female.

    J: The teacher holds a second job.

    The given conditions:

    P(F) = 0.68

    P(J) = 0.34

    P(F ∩ J) = 0.26

    What you want is P(F U J).

    P(F U J)

    = P(F) + P(J) - P(F ∩ J)

    = 0.68 + 0.34 - 0.26

    = 0.76

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