SOLUTION: six scores have a mean of 8. What must the 7th score be to increase the mean by 1?
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Question 581814: six scores have a mean of 8. What must the 7th score be to increase the mean by 1?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
S/6 = 8
S = 8*6
S = 48
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(S + x)/7 = 8 + 1
(48 + x)/7 = 8 + 1
(48 + x)/7 = 9
48 + x = 9*7
48 + x = 63
x = 63-48
x = 15
So the 7th score must be 15
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