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you have 12 mp3 songs on your computer.1/4 of them don't work.How many mp3 do you have to buy to replace the ones don't work?

User Suma
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You have 12 mp3 songs and 1/4 don't work. So do 12*1/4 which is 3. So 3 songs aren't working, so replace them by buying 3 songs.
User Caknia
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