The correct sample space of the repeated experiment is:
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, BBB, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR
Responses
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, BBB, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR, YYY, YYB, YYR, YBY, YBR, YBB, YRY, YRB, YRR
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, BBB, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR, YYY, YYB, YYR, YBY, YBR, YBB, YRY, YRB, YRR
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, BBB, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, BBB, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, RRR, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR, BBB, YYB, YYR, YBY, YBR, YBB, YRY, YRB, YRR
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, RRR, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR, BBB, YYB, YYR, YBY, YBR, YBB, YRY, YRB, YRR
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, YYY, YYB, YYR, YBY, YBR, YBB, YRY, YRB, YRR
RRR, RRY, RRB, RYR, RYB, RYY, RBR, RBY, RBB, BBB, BBY, BBR, BYB, BYR, BYY, BRB, BRY, BRR