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Diana's CD collection is made up of classical and pop CDs in the ratio 2;5.she has 8 classical CDs. how many pop CDS does she own?

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zexius
Diana owns 20 pop CDs.

Easiest way to work this out is to find out how much 1 part of this ratio is worth. If 8 classical CDs are 2 parts, then 1 part must equal 4 CDs. As it's in the ratio of 2:5, you have to multiply 1 part (4) by 5 to work out how many pop CDs there are (4 × 5 = 20). 

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