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Jean surveyed 25% of all eighth graders and 75% of all 7th graders. John surveyed 50% of all eighth graders and 50% of all 7th graders at the same school.

Jean surveyed a total of 152
John surveyed a total of 144

What is the number of eighth graders?

  • Math - ,

    if there are x 7th-graders and y 8th-graders,


    (x,y) = (160,128)

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