csat-suneung 2019 Q4

csat-suneung · South-Korea · csat__math-science 3 marks Conditional Probability Direct Conditional Probability Computation from Definitions

For two events $A , B$, $A$ and $B ^ { C }$ are mutually exclusive events, and $$\mathrm { P } ( A ) = \frac { 1 } { 3 } , \mathrm { P } \left( A ^ { C } \cap B \right) = \frac { 1 } { 6 }$$ What is the value of $\mathrm { P } ( B )$? (Here, $A ^ { C }$ is the complement of $A$.) [3 points]
(1) $\frac { 5 } { 12 }$
(2) $\frac { 1 } { 2 }$
(3) $\frac { 7 } { 12 }$
(4) $\frac { 2 } { 3 }$
(5) $\frac { 3 } { 4 }$

For two events $A , B$, $A$ and $B ^ { C }$ are mutually exclusive events, and
$$\mathrm { P } ( A ) = \frac { 1 } { 3 } , \mathrm { P } \left( A ^ { C } \cap B \right) = \frac { 1 } { 6 }$$
What is the value of $\mathrm { P } ( B )$? (Here, $A ^ { C }$ is the complement of $A$.) [3 points]\\
(1) $\frac { 5 } { 12 }$\\
(2) $\frac { 1 } { 2 }$\\
(3) $\frac { 7 } { 12 }$\\
(4) $\frac { 2 } { 3 }$\\
(5) $\frac { 3 } { 4 }$

Paper Questions

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