If A and B are two events such that \[P(A)=0.4\] , \[P\,(A+B)=0.7\] and \[P\,(AB)=0.2,\] then \[P\,(B)=\] [MP PET 1992]

If A and B are two events such that

1.	If A and B are two events such that \[P(A)=0.4\] , \[P\,(A+B)=0.7\] and \[P\,(AB)=0.2,\] then \[P\,(B)=\] [MP PET 1992]
A.	0.1
B.	0.3
C.	0.5
D.	None of these
Answer» D. None of these

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If A and B are two events such that \[P(A)=0.4\] , \[P\,(A+B)=0.7\] and \[P\,(AB)=0.2,\] then \[P\,(B)=\] [MP PET 1992]

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