Posted by **MX** on Monday, March 28, 2011 at 6:05pm.

The mean weight of 75 2nd graders is 55.7 lbs and

the mean weight of 25 1st graders is 42.6 lb.

What is the mean weight of the 100 children?

- Math -
**Ms.Sue**, Wednesday, December 5, 2012 at 6:53pm
1.7

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