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For any tow events A and B in a sample s...

For any tow events `A` and `B` in a sample space, (a) `P(A//B)geq(P(A)+P(B)-1)/(P(B))(P(B)!=0)` is always true (b) `P(Ann B )=1-P(A)-P(AnnB)` does not hold (c) `P(AuuB)=1-P( A )P( B ),if A and B` are independent (d) `P(AuuB)=1-P(A)P(B),if A and B` are disjoint

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