A person is selected at random from a population that has the following characteristics:

65% of the people are men; the others are women

12% of the men are smokers

7% of the women are smokers

Find (correct to four decimal places) the chance that the selected person is a man or a non-smoker.

Question

A person is selected at random from a population that has the following characteristics:

    65% of the people are men; the others are women

    12% of the men are smokers

    7% of the women are smokers

Find (correct to four decimal places) the chance that the selected person is a man or a non-smoker.

mathmale · Answer

I'd suggest that you construct a "contingency table" to organize this data.  Are you familiar with that?  You don't have to, but I find such tables to be very helpful in that they enable us to visualize the given data better.