Answer
$\frac{16}{81}$
Work Step by Step
The events are independent.
4 of the 9 tiles are C's:
P(C)=$\frac{4}{9}$
P(C)=$\frac{4}{9}$
P(C and C)=P(C) $\times$ P(C)
P(C and C)=$\frac{4}{9}$ $\times$ $\frac{4}{9}$
P(C and C)=$\frac{16}{81}$