Respuesta :
18 I believe
Say Red-R, Yellow-Y, Black-B, White-W, Silver-S, Green-G, Blue-b, and orange-o
You can get;
RBG
RBB
RBO
RWG
RWB
RWO
RSG
RSB
RSO
YBG
YBB
YBO
YWG
YWB
YWO
YSG
YSB
YSO
Say Red-R, Yellow-Y, Black-B, White-W, Silver-S, Green-G, Blue-b, and orange-o
You can get;
RBG
RBB
RBO
RWG
RWB
RWO
RSG
RSB
RSO
YBG
YBB
YBO
YWG
YWB
YWO
YSG
YSB
YSO