Using a Two-Way Table to Find Probabilities
Which expression represents the conditional
probability that a randomly selected freshman has
English as the first class of the day?
At West View High School, every freshman (F) and
sophomore (So) has either math (M), science (S),
English (E), or history (H) as the first class of the day
The two way table shows the distribution of students by
first class and grade level
S E H Total
What is the probability that a randomly selected
freshman has English as the first class of the day
Fr 78 32 59 43 212
30 | 30 | 85 | 42 | 51 | 196
Total 116 | 97 | 101 | 94 | 400
Intro