Find the Indicated Probability by Using the General Addition Rule $\mathrm { P } ( \mathrm { A } ) = 0.47 , \mathrm { P } ( \mathrm { B } ) = 0.31$

Multiple Choice

Find the indicated probability by using the general addition rule.
-For a person selected randomly from a certain population, events A and B are defined as follows. A = event the person is male
B = event the person is a smoker For this particular population, it is found that $\mathrm { P } ( \mathrm { A } ) = 0.47 , \mathrm { P } ( \mathrm { B } ) = 0.31$ , and $\mathrm { P } ( \mathrm { A } \& \mathrm {~B} ) = 0.12$ . Find $\mathrm { P } ( \mathrm { A }$ or $\mathrm { B } )$ . Round approximations to two decimal places.

A) $0.90$
B) $0.78$
C) $0.54$
D) $0.66$