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March 30, 2015

March 30, 2015

Posted by **mary** on Friday, July 27, 2012 at 9:50pm.

- math -
**Reiny**, Friday, July 27, 2012 at 10:02pmSum of the seven number = 7(45) = 315

after adding 2 more the sum is now 9(37) or 333

so the sum of the two numbers added must have been 18

or their average (mean) must have been 18/2, which is 9

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