[tex]P_{(red=even)&(green=even)}=P_{red=even} \times P_{green=even}[/tex]
[tex]P_{(red=even)&(green=even)}=\frac{even}{total} \times \frac{even}{total}[/tex]
[tex]P_{(red=even)&(green=even)}=\frac{3}{6} \times \frac{3}{6}[/tex]
[tex]P_{(red=even)&(green=even)}=\frac{9}{36} [/tex]
[tex]P_{(red=even)&(green=even)}=\frac{1}{4} = 25\%[/tex]