If A and B are any two events such that ...

If A and B are any two events such that `P (A) + P (B) - P ( A nn B) = P (A) ` then ___________.

A

`P (B//A) = 1 `

B

`P (A//B) = 0`

C

`P (B//A) = 0`

D

`P (A//B) =1`

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