The size of this set is interesting, also, and can be explicitly determined: the logarithm of it is exactly the entropy of the Bernoulli process. Once again, consider the set of all strings of length "n". The size of this set is formula_40. Of these, only a certain subset are likely; the size of this set is formula_41 for formula_42. By using Stirling's approximation, putting it into the expression for "P"("k","n"), solving for the location and width of the peak, and finally taking formula_38 one finds that