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Mark has 30 cd's. 40% are country music. 30% pop music. How many CDs are other types of music?
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Mark has 30 cd's. 40% are country music. 30% pop music. How many CDs are other types of music?

User CrsCaballero
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5 votes
9 cd's because you multiply .7*30 and that is 21 so 30-21=9
User Khalid Abuhakmeh
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6 votes
So first you add 40 percent and 30 percent to get 70 percent. After you do that subtract it from 100 to get 30. 30% times 30 is 9 so the answer is 9 cds.
User Stecb
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8.5k points
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