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2 March, 16:17

There are three grades in the school. One grade has 1/3 of the students, one grade has 1/4 of the students. What fraction of students is in the remaining grade?

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  1. 2 March, 16:54
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    Step-by-step explanation:

    Let x represent the total number of stdents that has all grades in the school.

    There are three grades in the school. One grade has 1/3 of the students, this means that number of students that belongs tho this grade is 1/3 * x = x/3

    One grade has 1/4 of the students, this means that number of students that belongs to this grade is 1/4 * x = x/4

    Total number of students in both grades would be x/3 + / x/4 = 7x/12

    The number of students in the remaining grade would be

    x - 7x/12 = 5x/12

    fraction of students in the remaining grade would be

    (5x/12) / x = 5/12
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