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Ten students wrote a test, and the distribution of scores is shown on the frequency table. If the average

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Ten students wrote a test, and the distribution of scores is shown on the frequency table. If the average

by Gmat_mission » Sun Apr 26, 2020 11:53 am

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Ten students wrote a test, and the distribution of scores is shown on the frequency table. If the average (arithmetic mean) score is 62, what is the value of \(x ?\)

A. 62
B. 65
C. 71
D. 76
E. 83

[spoiler]OA=B[/spoiler]

Source: Magoosh
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Re: Ten students wrote a test, and the distribution of scores is shown on the frequency table. If the average

by Scott@TargetTestPrep » Sun May 03, 2020 5:28 am
Gmat_mission wrote: ↑
Sun Apr 26, 2020 11:53 am
 testresults_figure.PNG

Ten students wrote a test, and the distribution of scores is shown on the frequency table. If the average (arithmetic mean) score is 62, what is the value of \(x ?\)

A. 62
B. 65
C. 71
D. 76
E. 83

[spoiler]OA=B[/spoiler]

Source: Magoosh
(40 * 1 + 55 * 2 + 70 * 3 + x * 4)/10 = 62

40 + 110 + 210 + 4x = 620

360 + 4 x = 620

4x = 260

x = 65

Answer: B

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