Finding Probability Using Sets

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How do I go about solving the following probability problem.



$P(Acup(B^complementcup C^complement)^complement)$.



Events $A$, $B$ and $C$ are disjoint and $P(A)=2/5$



Using De Morgan's for
$B^complementcup C^complement=(Bcap C)^complement$



and the compliment of this gives



$Bcap C$.



So do I end up with



$Acup (Bcap C)$



If $P(A)=2/5$. How do I find the propability of



$Acup(B^complementcup C^complement)^complement$










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  • Note $cup$ turns to $cap$ in De Morgan: $ B^complement cup C^complement = (B colorredcap C)^complement $
    – Ben
    Sep 10 at 8:06










  • Yes. Thank you. I corrected the question.
    – rizzo
    Sep 10 at 8:13










  • If $B$ and $C$ are disjoint, then $B cap C $ is empty, and hence $Acup (Bcap C) = A$.
    – Hayk
    Sep 10 at 8:19










  • @rizzo Before asking any new questions first take a look at MathJax.
    – drhab
    Sep 10 at 8:25










  • Thank you Hayk. And thanks for the link drhab.
    – rizzo
    Sep 10 at 8:36














up vote
0
down vote

favorite












How do I go about solving the following probability problem.



$P(Acup(B^complementcup C^complement)^complement)$.



Events $A$, $B$ and $C$ are disjoint and $P(A)=2/5$



Using De Morgan's for
$B^complementcup C^complement=(Bcap C)^complement$



and the compliment of this gives



$Bcap C$.



So do I end up with



$Acup (Bcap C)$



If $P(A)=2/5$. How do I find the propability of



$Acup(B^complementcup C^complement)^complement$










share|cite|improve this question























  • Note $cup$ turns to $cap$ in De Morgan: $ B^complement cup C^complement = (B colorredcap C)^complement $
    – Ben
    Sep 10 at 8:06










  • Yes. Thank you. I corrected the question.
    – rizzo
    Sep 10 at 8:13










  • If $B$ and $C$ are disjoint, then $B cap C $ is empty, and hence $Acup (Bcap C) = A$.
    – Hayk
    Sep 10 at 8:19










  • @rizzo Before asking any new questions first take a look at MathJax.
    – drhab
    Sep 10 at 8:25










  • Thank you Hayk. And thanks for the link drhab.
    – rizzo
    Sep 10 at 8:36












up vote
0
down vote

favorite









up vote
0
down vote

favorite











How do I go about solving the following probability problem.



$P(Acup(B^complementcup C^complement)^complement)$.



Events $A$, $B$ and $C$ are disjoint and $P(A)=2/5$



Using De Morgan's for
$B^complementcup C^complement=(Bcap C)^complement$



and the compliment of this gives



$Bcap C$.



So do I end up with



$Acup (Bcap C)$



If $P(A)=2/5$. How do I find the propability of



$Acup(B^complementcup C^complement)^complement$










share|cite|improve this question















How do I go about solving the following probability problem.



$P(Acup(B^complementcup C^complement)^complement)$.



Events $A$, $B$ and $C$ are disjoint and $P(A)=2/5$



Using De Morgan's for
$B^complementcup C^complement=(Bcap C)^complement$



and the compliment of this gives



$Bcap C$.



So do I end up with



$Acup (Bcap C)$



If $P(A)=2/5$. How do I find the propability of



$Acup(B^complementcup C^complement)^complement$







probability probability-theory






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edited Sep 10 at 8:15









drhab

89.4k541123




89.4k541123










asked Sep 10 at 8:00









rizzo

12




12











  • Note $cup$ turns to $cap$ in De Morgan: $ B^complement cup C^complement = (B colorredcap C)^complement $
    – Ben
    Sep 10 at 8:06










  • Yes. Thank you. I corrected the question.
    – rizzo
    Sep 10 at 8:13










  • If $B$ and $C$ are disjoint, then $B cap C $ is empty, and hence $Acup (Bcap C) = A$.
    – Hayk
    Sep 10 at 8:19










  • @rizzo Before asking any new questions first take a look at MathJax.
    – drhab
    Sep 10 at 8:25










  • Thank you Hayk. And thanks for the link drhab.
    – rizzo
    Sep 10 at 8:36
















  • Note $cup$ turns to $cap$ in De Morgan: $ B^complement cup C^complement = (B colorredcap C)^complement $
    – Ben
    Sep 10 at 8:06










  • Yes. Thank you. I corrected the question.
    – rizzo
    Sep 10 at 8:13










  • If $B$ and $C$ are disjoint, then $B cap C $ is empty, and hence $Acup (Bcap C) = A$.
    – Hayk
    Sep 10 at 8:19










  • @rizzo Before asking any new questions first take a look at MathJax.
    – drhab
    Sep 10 at 8:25










  • Thank you Hayk. And thanks for the link drhab.
    – rizzo
    Sep 10 at 8:36















Note $cup$ turns to $cap$ in De Morgan: $ B^complement cup C^complement = (B colorredcap C)^complement $
– Ben
Sep 10 at 8:06




Note $cup$ turns to $cap$ in De Morgan: $ B^complement cup C^complement = (B colorredcap C)^complement $
– Ben
Sep 10 at 8:06












Yes. Thank you. I corrected the question.
– rizzo
Sep 10 at 8:13




Yes. Thank you. I corrected the question.
– rizzo
Sep 10 at 8:13












If $B$ and $C$ are disjoint, then $B cap C $ is empty, and hence $Acup (Bcap C) = A$.
– Hayk
Sep 10 at 8:19




If $B$ and $C$ are disjoint, then $B cap C $ is empty, and hence $Acup (Bcap C) = A$.
– Hayk
Sep 10 at 8:19












@rizzo Before asking any new questions first take a look at MathJax.
– drhab
Sep 10 at 8:25




@rizzo Before asking any new questions first take a look at MathJax.
– drhab
Sep 10 at 8:25












Thank you Hayk. And thanks for the link drhab.
– rizzo
Sep 10 at 8:36




Thank you Hayk. And thanks for the link drhab.
– rizzo
Sep 10 at 8:36










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Since the sets $A,B,C$ are disjoint we have:$$P(Acup (B^complementcup C^complement)^complement)=P(Acup (Bcap C))=P(A)+P(Bcap C)=P(A)+P(varnothing)=frac25+0=frac25$$






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    1 Answer
    1






    active

    oldest

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    1 Answer
    1






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    oldest

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    active

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    up vote
    0
    down vote



    accepted










    Since the sets $A,B,C$ are disjoint we have:$$P(Acup (B^complementcup C^complement)^complement)=P(Acup (Bcap C))=P(A)+P(Bcap C)=P(A)+P(varnothing)=frac25+0=frac25$$






    share|cite|improve this answer
























      up vote
      0
      down vote



      accepted










      Since the sets $A,B,C$ are disjoint we have:$$P(Acup (B^complementcup C^complement)^complement)=P(Acup (Bcap C))=P(A)+P(Bcap C)=P(A)+P(varnothing)=frac25+0=frac25$$






      share|cite|improve this answer






















        up vote
        0
        down vote



        accepted







        up vote
        0
        down vote



        accepted






        Since the sets $A,B,C$ are disjoint we have:$$P(Acup (B^complementcup C^complement)^complement)=P(Acup (Bcap C))=P(A)+P(Bcap C)=P(A)+P(varnothing)=frac25+0=frac25$$






        share|cite|improve this answer












        Since the sets $A,B,C$ are disjoint we have:$$P(Acup (B^complementcup C^complement)^complement)=P(Acup (Bcap C))=P(A)+P(Bcap C)=P(A)+P(varnothing)=frac25+0=frac25$$







        share|cite|improve this answer












        share|cite|improve this answer



        share|cite|improve this answer










        answered Sep 10 at 8:19









        drhab

        89.4k541123




        89.4k541123



























             

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