multiplicity probability

How Do You Calculate Macrostates? The probability for the four microstates are: P(HH) = P(HT) = P(TH) = P(TT) = 1/4. The probability for the the three macrostates : P(2H) = P(0H) = 1/4, and P(1H) = 2/4 = 1/2 ( the most probable). Generally, the probability of n heads is equal to Ω(n)/Ω. Ω