Exercise 1 Construct the sample space of the following random experiments:
Pick a random person and record the gender and whether she or he is smoker or not. Pick a random person and record the blood type and whether she or he is smoker or not.
Exercise 1 A test was applied to a sample of people in order to evaluate its effectiveness; the results are as follows:
$$ \begin{array}{l|cc} & \mbox{Test }+ & \mbox{Test }- \newline \hline \mbox{Sick} & 2020 & 140 \newline