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12 July, 06:28

There is a group of student, 1/3 are in elementary, 1/2 are in middle school and 15 are in high school. How many are in the group?

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  1. 12 July, 06:57
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    1/2 + 1/3 = 3/6 + 2/6 = 5/6

    we have 5/6 so 15 is 1/6 of the entire group

    15 * 6 = 90
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