Mathematics Asked by Eod Enaj on February 12, 2021
I have that $(X,mathbf{A},mu)$ is a probability space and $A,B in mathbf{A}$ with $mu(A)=frac{5}{12}$ , $mu(B)=frac{1}{2}$ and $mu((Acup B)^{c}) = frac{1}{4}$.
I would like to find $mu(Acap B )$.
Is it correct to calculate that $mu(Acup B) = 1 – mu((Acup B)^{c}) = 1 – frac{1}{4} = frac{3}{4}$?
And then use the fact that $mu(Acup B) + mu(Acap B) = mu(A) + mu(B)$ to find that
$mu(Acap B) = mu(A) + mu(B) – mu(Acup B) = frac{5}{12} + frac{1}{2} – frac{3}{4} = frac{1}{6}$ ?
I’m not sure about this so any input would be much appreciated!
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