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OpenStudy (anonymous):
The mean score on a set of 17 tests was 87. Then two more scores, 65 and 59, were added. Whats the new mean?
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OpenStudy (raden):
the new mean = (17 * 87 + 65 + 59)/(17+2) = ...
OpenStudy (anonymous):
84.36?
OpenStudy (raden):
yup, that's right
OpenStudy (anonymous):
Thank you!
OpenStudy (raden):
welcome
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