SOLUTION: probability: how many boys out of 4 newborns

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Question 376302: probability: how many boys out of 4 newborns
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Out of 4 newborns, you get 2%5E4=16 possible outcomes.
BBBB=4+B
BBBG=3++B
BBGB=3++B
BBGG=2++B
BGBB=3++B
BGBG=2++B
BGGB=2+B
BGGG=1++B
GBBB=3++B
GBBG=2++B
GBGB=2++B
GBGG=1++B
GGBB=2++B
GGBG=1++B
GGGB=1++B
GGGG=0++B
So then the probability is,
4 boys:P%284+B%29=1%2F16
3 boys:P%283+B%29=4%2F16=1%2F4
2 boys:P%282+B%29=6%2F16=3%2F8
1 boys:P%281+B%29=4%2F16=1%2F4
0 boys:P%280+B%29=1%2F16