A) 2/3
B) 1/3
C) 5/6
D) 1/2
Correct Answer: B
Solution :
[b] \[P(A)=\frac{1}{4},P(A\cup B)=\frac{1}{2}\] \[\frac{P(A\cup B)-P(A)}{1-P(A)}=\frac{P(A\cup B)-P(A)}{1-P(A)}\] \[[\therefore P(A\cup B)+P(B)-P(A\cap B)]\] \[=\frac{\frac{1}{2}-\frac{1}{4}}{1-\frac{1}{4}}=\frac{1}{4}\times \frac{4}{3}=\frac{1}{3}\]You need to login to perform this action.
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