O You are dealt two cards successively (without replacement) from a shuffled deck of numbered cards which have the numbers from 1 to 50. Find the probability that the first is even and the second is odd. Express your answer as a simplified fraction.

Given that 

Total people selected (n) = 1114

Regular smokers = 162

Heavy smokers = 93

both heavy and regular smokers included = (162+93)=255

We know that 

$Probability=\frac{Number of favorable events}{Total number of events}$

one person is randomly selected the probability it is either regular or heavy smoker.

Favorable events = 255

Total events = 1114

Probability = $=\frac{255}{1114}=0.2289$

If a person is drawn random the probability that regular or heavy smoker is 0.2289