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January 31, 2015

January 31, 2015

Posted by **kristen** on Sunday, April 8, 2012 at 10:10pm.

- math -
**Steve**, Monday, April 9, 2012 at 11:37amr/b = 20/40 = 1/2

w/r = 30/20 = 3/2

(r+b)/(r+b+w) = (20+40)/(20+40+30) = 2/3

or, 1 - 30/90 = 2/3

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