dodokurli01 dodokurli01

21-11-2016
Mathematics

contestada

Eight scores have an average of six. Scores of 15 and x increase the average to 7. Find x

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texaschic101 texaschic101

21-11-2016

a/8 = 6....a = 6 * 8.....a = 48

(48 + 15 + x) / 10 = 7
(63 + x) / 10 = 7
63 + x = 70
x = 70 - 63
x = 7 <====

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