SOLUTION: In a group of 40 children, 12 have blonde hair, 14 have brown eyes, and 5 have both blonde hair and brown eyes. If a child is selected at random, find the probability of the follow

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Question 1101273: In a group of 40 children, 12 have blonde hair, 14 have brown eyes, and 5 have both blonde hair and brown eyes. If a child is selected at random, find the probability of the following. (Round your answers to three decimal places.)
(a) The child has blonde hair and brown eyes.

(b) The child has blonde hair or brown eyes.
Found 2 solutions by Boreal, richwmiller:
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
==========BL=========Not=====total
BR eye-----5-----------------14
Not BR
Total=====12-----------------40
==========BL=========Not=====total
BR eye-----5----------9------14
Not BR ====7========19=======26
Total=====12--------28-------40
a. Already given as 5/40=0.125
b. That is 12/40+14/40-5/40 (double counted)=21/40=0.525
It is also 1-p(not brown and not blonde)=21/40=0.525

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
I like Venn diagrams.