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January 30, 2015

January 30, 2015

Posted by **Diana** on Monday, December 27, 2010 at 12:18am.

- math -
**Reiny**, Monday, December 27, 2010 at 12:33amthere are only 4 cases:

WW --- prob is (3/5)(2/4) = 6/20

WR --- prob is (3/5)(2/4) = 6/20

RW --- prob is (2/5)(3/4) = 6/20

RR --- prob is (2/5)(1/4) = 2/20

so different colours are : WR and RW = 6/20 + 6/20 = 12/20 = 3/5

(notice the 4 cases add up to 1)

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