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22 December, 05:09

Three eights of the cast in a musical have to sing. What fraction of the cast does not have to sing

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Answers (2)
  1. 22 December, 05:16
    0
    5/8 of the cast does not have to sing. You find this by doing 8/8 - 5/8
  2. 22 December, 05:34
    0
    3/8 has to sing

    8/8 is all

    all=haveto+don'thaveto

    all=8/8

    haveto=3/8

    subsitute

    8/8=3/8+don'thaveto

    subtract 3/8 from both sides

    8/8-3/8=5/8

    5/8=don'thavetosing

    answer is 5/8
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