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Math Help - Venn diagram and Probability

  1. #1
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    Venn diagram and Probability

    Hi I am quite bad at IB Maths Probablitiy, if you guys could help that would be much appreciated.

    Venn diagram and Probability-venn1.jpg

    Events A and B are such that P(A) = 0.3, P(B) = 0.6 and P(A∪B) = 0.7

    The values q, r, s and t represent probabilities.

    (a) Write down the value of t.
    (b) Show that r = 0.2.
    (c) Write down the value of q and of s.
    (d) Write down P(B').
    (e) Find P(A|B')

    Cheers!
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  2. #2
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    Re: Venn diagram and Probability

    Quote Originally Posted by tchoxobey View Post
    Hi I am quite bad at IB Maths Probablitiy, if you guys could help that would be much appreciated.
    Events A and B are such that P(A) = 0.3, P(B) = 0.6 and P(A∪B) = 0.7
    The values q, r, s and t represent probabilities.
    (a) Write down the value of t.
    (b) Show that r = 0.2.
    (c) Write down the value of q and of s.
    (d) Write down P(B').
    (e) Find P(A|B')
    You need to understand that this is not a homework service.
    You are expected to show some efforts.

    Hints: q+r+x+t=1
    & \mathcal{P}(A\cup B)=\mathcal{P}(A)+\mathcal{P}(B)-\mathcal{P}(A\cap B)~.
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