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What was the average (arithmetic mean) score for all the fre

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What was the average (arithmetic mean) score for all the fre [#permalink]  29 Aug 2018, 16:35
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Question Stats:

100% (00:52) correct 0% (00:00) wrong based on 12 sessions
Score results on a college mathematics proficiency exam

 Freshmen Sophomores Number of students taking the exam 120 80 Average (arithmetic mean) score on the exam 78 points 84 points

What was the average (arithmetic mean) score for all the freshmen and sophomores taking the exam? Give your answer rounded to the nearest 0.1 points.

[Reveal] Spoiler: OA
80.4

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Re: What was the average (arithmetic mean) score for all the fre [#permalink]  30 Aug 2018, 01:16
avg = $$\frac{120*78 + 80*84}{200}$$= $$\frac{16080}{200}$$ = 80.4
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Re: What was the average (arithmetic mean) score for all the fre [#permalink]  31 Aug 2018, 20:46
Good question for practising the weighted average concept
Re: What was the average (arithmetic mean) score for all the fre   [#permalink] 31 Aug 2018, 20:46
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