math

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After six biology tests, Ruben has a mean score of 73. What score does Ruben need on the next test to raise his average (mean) to 75?

  • math -

    let that score be x

    solve for x
    (6(73) + x)/7 = 75

  • math -

    73x6=438

    (438+X)/7=75

    438X=75

    X=87

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