Pg 315 (327) - Q21
Be really careful with this one and read what it says. By sorting
out the chart, you can see that you have 3 professionals under the age
of 20, and you have 5 amateurs that are 20 years old or older. If
you simply do your arithmetic and read what it says, it asks how many games
are played between the amateurs 20 or older and the pros under 20.
Well, each of the three is going to play each of the five. Therefore,
you have 15
games and C is the correct answer.