csat-suneung 2016 Q7

csat-suneung · South-Korea · csat__math-A 3 marks Conditional Probability Direct Conditional Probability Computation from Definitions
For two events $A , B$, $$\mathrm { P } ( A ) = \frac { 2 } { 5 } , \quad \mathrm { P } ( B \mid A ) = \frac { 5 } { 6 }$$ what is the value of $\mathrm { P } ( A \cap B )$? [3 points]
(1) $\frac { 1 } { 3 }$
(2) $\frac { 4 } { 15 }$
(3) $\frac { 1 } { 5 }$
(4) $\frac { 2 } { 15 }$
(5) $\frac { 1 } { 15 }$
For two events $A , B$,
$$\mathrm { P } ( A ) = \frac { 2 } { 5 } , \quad \mathrm { P } ( B \mid A ) = \frac { 5 } { 6 }$$
what is the value of $\mathrm { P } ( A \cap B )$? [3 points]\\
(1) $\frac { 1 } { 3 }$\\
(2) $\frac { 4 } { 15 }$\\
(3) $\frac { 1 } { 5 }$\\
(4) $\frac { 2 } { 15 }$\\
(5) $\frac { 1 } { 15 }$