4.已知事件A与B相互独立,且P(overline(AB))=(1)/(9),P(overline(AB))=P(overline(AB)),求P(A),P(B).

4.已知事件A与B相互独立,且$P(\overline{AB})=\frac{1}{9}$,$P(\overline{AB})=P(\overline{AB})$,求P(A),P(B).

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