The total number of marbles is [tex]3+2+2+1=8[/tex].
If we draw a red marble, the chance of that occurring is [tex]\frac{2}{8}=\frac{1}{4}=0.25[/tex].
Now the total number of marbles left is 7. If we then draw a green marble, the chance of that occurring is [tex]\frac{2}{7}\approx 0.29[/tex].
So the chance of drawing a red, then green, marble is [tex]\frac{1}{4}*\frac{2}{7}=\frac{2}{28}=\frac{1}{14}\approx 0.07[/tex].
