Evelyn has a bag containing red (R), blue (B), and green (G) marbles as shown below.

3 red marbles, 3 green marbles, and 2 blue marbles.

If each marble is replaced after it is drawn, what is the probability of randomly drawing three consecutive red (R) marbles?
StartFraction 3 over 256 EndFraction
StartFraction 1 over 56 EndFraction
StartFraction 1 over 27 EndFraction
StartFraction 27 over 512 EndFraction