Applying What You’ve Learned
38. Online music survey. Pandora.com surveyed a group of subscribers regarding which online music channels they use on a regular basis. The following information summarizes their answers:
7 listened to rap, heavy metal, and alternative rock.
10 listened to rap and heavy metal.
13 listened to heavy metal and alternative rock.
12 listened to rap and alternative rock.
17 listened to rap.
24 listened to heavy metal.
22 listened to alternative rock.
9 listened to none of these three channels.
a. How many people a. were surveyed?
b. How many people listened to either rap or alternative rock?
c. How many listened to heavy metal only?
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