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6 June, 22:37

You get a 90%, 75% and 80% on your practices. There is one more practice before the test. What score do you need on the fourth practice to get an average of 85%?

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  1. 6 June, 23:11
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    (90 + 75 + 80 + x) / 4 = 85

    (245 + x) / 4 = 85

    245 + x = 85 * 4

    245 + x = 340

    x = 340 - 245

    x = 95 < = = = u need a 95
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