SOLUTION: Six scores have mean 10. What must the seventh score be to increase the mean by 1?
Algebra.Com
Question 936271: Six scores have mean 10. What must the seventh score be to increase the mean by 1?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Six scores have mean 10. What must the seventh score be
to increase the mean by 1?
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mean = (sum of scores)/(# of scores)
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Equations:
sum = 6*10 = 60
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Let the 7th score be "x"::
(60+x)/7 = 11
60+x = 77
x = 17
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Cheers,
Stan H.
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