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Math Help - check probability answer please

  1. #1
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    Question check probability answer please

    P(E)=0.30, P(F)=0.40, P(E intersec F)=0.1 P(E union F)=____.

    My answer is 0.30+0.40-0.1= .6 is this right, thanks for checking my answer.

    1. 0.70
    2. 0.60
    3. 0.50
    4. 0.40
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by kwtolley
    P(E)=0.30, P(F)=0.40, P(E intersec F)=0.1 P(E union F)=____.

    My answer is 0.30+0.40-0.1= .6 is this right, thanks for checking my answer.

    1. 0.70
    2. 0.60
    3. 0.50
    4. 0.40
    Looks OK to me.

    Especially since:

    P(x \cup y)=P(x)+P(y) - P(x \cap y)

    RonL
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  3. #3
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    Smile thank you

    thanks again for checking
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