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An employment agency requires applicants average at least 70% on a battery of four job skills tests. If an applicant scored 70%, 78%, and 82% on the first three exams, what must he score on the fourth test to maintain a 70% or better average?

  • math -

    4 * 70% = 280

    70 + 78 + 82 = 230

    280 - 230 = 50

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