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15 January, 00:45

Lauren counted 27 students in the cafeteria the ratio of students that packed their lunch to those who bought lunch was 4:5 how many students bought their lunch

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  1. 15 January, 03:06
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    27 students is basically the sum of their ratios 4:5

    We can define the proportion with an arbitary variable x - >

    4x:5x

    Which is the ratio of packed to bought lunch. Therefore, 4x + 5x = 9x. 9x = 27

    x=3

    The students that bought their lunch were the 5x group, therefore 15 students bought lunch.
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