A) 0.9
B) 1.15
C) 1.1
D) 1.2
Correct Answer: C
Solution :
\[1-P({A}'\cap {B}')=0.6,\] \[P(A\cap B)=0.3,\] then \[P({A}'\cup {B}')=P({A}')+P({B}')-P({A}'\cap {B}')\] Þ \[1-P(A\cap B)=P({A}')+P({B}')-0.4\] Þ \[P({A}')+P({B}')=0.7+0.4=1.1\].You need to login to perform this action.
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