Math
posted by KeKe .
If a family has 4 children, in how many ways could the parents have 2 boys and 2 girls as children?

BBGG
BGGB
BGBG
GBBG
GBGB
GGBB
4!/2!2!=4*3*2*1/2*2=6 
Write 5*10^ 4 in decimal notation.
Select the correct answer.
0.00005
50000
5000
0.0005 
0.0005