Question

2. A survey of employees in a big company provided the following data: Smoker 370 Non-smoker 50 Male Female 140 180 If an employee is selected at random, find the probability that: a) The employee is either male or non-smoker; b) The employee is neither male nor non-smoker; c) The employee is a smoker, given is male.

Answer 1

2 © Smoker (S) 370 Non smoker (N) 420 2) 180 2) 320 M Corale) f (female) Total 140 230 340 510 fa) (mus) p(kither male or smokes) plm) P(s) t P (mns) fonto plom) = 420 Total male Total employee Juo p(s): Total Smolars 510 Total employee zro PIMOS 320 Tohl male fmokers Total employee 4o P(mus)= 420 +500-370 0.757 740 (b) P ( neithes make Nor Non smoker) 2 pl female & smoker) 140 20.189 Juo

( es PC smoker male) P (som) (Baye's theorem) P (M) 320 Taro 120 1240 370 0.881 420