If \[P\,(A)=0.4,\,\,P\,(B)=x,\,\,P\,(A\cup B)=0.7\] and the events A and B are independent, then x = [CEE 1993]

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1.	If \[P\,(A)=0.4,\,\,P\,(B)=x,\,\,P\,(A\cup B)=0.7\] and the events A and B are independent, then x = [CEE 1993]
A.	\[\frac{1}{3}\]
B.	\[\frac{1}{2}\]
C.	\[\frac{2}{3}\]
D.	None of these
Answer» C. \[\frac{2}{3}\]

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If \[P\,(A)=0.4,\,\,P\,(B)=x,\,\,P\,(A\cup B)=0.7\] and the events A and B are independent, then x = [CEE 1993]

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