19. A
There are 4 papers with a score of 6, and there are 12 papers total. So the probability of selecting a paper with a score of 6 is [tex] \frac{4}{12} [/tex]. Dividing both sides by 4 will simplify it to [tex] \frac{1}{3} [/tex].
20. F
There are 2 papers with a score greater than 7, and there are 12 papers total. The probability of selecting a paper with a score greater than 7 is [tex] \frac{2}{12} [/tex]. This can be simplified by dividing both sides by 2. The answer then comes out to [tex] \frac{1}{6} [/tex].
