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Aaron’s first three quiz scores were 75, 84, and 82. If his

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Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post 29 Aug 2018, 16:26
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Aaron’s first three quiz scores were 75, 84, and 82. If his score on the fourth quiz reduced his average (arithmetic mean) quiz score to 74, what was his score on the fourth quiz?

[Reveal] Spoiler: OA
55

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Re: Aaron’s first three quiz scores were 75, 84, and 82. If his [#permalink] New post 31 Aug 2018, 22:05
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Answer is 55.
Since the sum of the first three is 241
Thus
241+x/3 = 74
which gives x=55
Re: Aaron’s first three quiz scores were 75, 84, and 82. If his   [#permalink] 31 Aug 2018, 22:05
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Aaron’s first three quiz scores were 75, 84, and 82. If his

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