Question 16 unsaved a survey of teenagers found the music preferences listed. country jazz rock classical new age other 12 5 7 6 6 4 if you pick a teenager at random, what is p(rock)

According to the survey,

Country - 12
Jazz - 5
Rock - 7
Classical - 6
New Age - 6
Other - 4

TOTAL = 12 + 5 + 7 + 6 + 6 + 4 = 40

Since rock has 7 preferences out of 40,
If you pick a teenager at random
P (rock) = 7/40