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If P(A)=P(A//B)=(1)/(4) and P(B//A)=(1)/...

If `P(A)=P(A//B)=(1)/(4) and P(B//A)=(1)/(2)`, check whether the following statements are true or false:
(a) A and B are mutually independent and
(b) `P(A^(c )//B)=(3)/(4)`.

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