A) 0.3
B) 0.5
C) 0.7
D) 0.9
Correct Answer: D
Solution :
\[P(A'\,\cap B')\,=1-P(A\cup B)\,=1-0.8=0.2\] \[P(A'\cup B')=1-P(A\cap B)=1-0.3=0.7\] \[P(A'\cup B')=P(A')\,+\,P(B')-P(A'\cap B')\] Þ \[\,0.7\,=P(A')+P(B')-0.2\] Þ \[\therefore \].You need to login to perform this action.
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