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9 June, 05:20

A school library has a hundred and twenty DVDs in its collection given that 45% of the DVDs are about science and 35% are about history how many of the DVDs are about other subjects

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  1. 9 June, 06:23
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    20% of the DVDs are about other subjects
  2. 9 June, 08:50
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    45 % + 35% is 80%

    80% of 120 (.80 times 120) = 96

    120-96 = 24

    24 of the books are other subjects
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