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March 6, 2015

March 6, 2015

Posted by **kirk** on Thursday, August 12, 2010 at 11:14am.

the mean for his group to be 70. Alice corrected the remaining

20 papers and found that the mean for her

group was 80. What is the mean of the combined group

of 30 students?

- math -
**Ms. Sue**, Thursday, August 12, 2010 at 11:17am10 * 70 = 700

20 * 80 = 1600

700 + 1600 = 2300

2300 / 30 = ?

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