Younger than 18-30 more than 30 18 years old years old
years old
stretched before
5
9
4
the game
did not stretch
10
1
1
before the game
One of the sports medicine students, Han, wants to know the
probability that one of the participants in the game selected
at random is younger than 18 years old or stretched before
the game. To figure this out, he adds the three values in the
first row of the table (5, 9, and 4) to the two values listed
under the heading "younger than 18 years old" (5 and 10). He
then divides that answer by 30 and obtains a probability of 3
Han realizes that is greater than 1 and determines that he
must have made a mistake.
a) What is Han's mistake? Explain your reasoning.