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1 vote
A survey of teenagers found the music preferences listed. If you pick a teenager at random, what is P(rock)?

Country : 12
Jazz : 5
Rock : 7
Classical : 6
New Age : 6
Other : 4
A.33/40
B.1/7
C.7/40
D.1

1 Answer

5 votes
We can see from this survey that 7 teenagers prefer rock and roll.
The number of all teenagers in the survey is:
12 + 5 + 7 + 6 + 6 + 4 = 40
P ( rock ) = 7 / 40
Answer: C ) 7 / 40
User Bryuk
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