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20 December, 13:15

Jim has gotten scores of 99 and 93 on his first two tests. what score must he get on his third test to keep an average of 90 or greater

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  1. 20 December, 13:34
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    For the average to be 90,

    (99 + 93 + x) / 3 = 90

    or 192 + x = 270

    or x = 270 - 192 = 78

    Jim must score at least 78 in the third test.
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