#### Answer

$\frac{1}{4}$

#### Work Step by Step

If A and B are independent events, then
P(A and B) = P(A)*P(B).
(A+B): a color other than red each time
A: green or yellow
B: green or yellow
P(A) = $\frac{3}{6}$
P(B) = $\frac{3}{6}$
Both events A and B are independent:
P(A and B) = $\frac{3}{6}$ .$\frac{3}{6}$
= $\frac{1}{4}$