Answer
15/256
Work Step by Step
The probabilities are independent of each other. Thus we need to apply the following principles,
$P(A$ and $B) = P(A)*P(B)$
P(A) = 3/16
P(B) = 5/16
The probability of the event is the number of slices of the given color over the number of total slices.
$P(A$ and $B)$ = $5/16*3/16$ = $15/256$