P(r) = 60/360 = 1/6
P(w) = 1 - P(r) = 5/6
P(www) = (5/6)^3 = 125/216
P(wwr) = P(wrw) = P(rww) = (5/6)^2 * (1/6) = 25/216
P(wrr) = P(rwr) = P(rrw) = (5/6) * (1/6)^2 = 5/216
P(rrr) = (1/6)^2 = 1/216
P(A) = 125/216
P(B) = 3 * 25/216 = 75/216
P(C) = 3 * 5/216 = 15/216
P(D) = 1/216