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Three events A , B and C have probabilit...

Three events A , B and C have probabilities `2/5,1/3a n d1/2` respecively. Given tat `P(AnnC)=1/5a n dP(BnnC)=1/4,` find the values of `P(C//B)a n dP( A^- nn C^- )dot`

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