flips = ["H", "T"]
    value = 0
    counted_runs = 0

    1_000_000.times do |i|
      outcomes = [flips.sample, flips.sample, flips.sample].join
      next if outcomes.scan(/(?=H.)/).length == 0   # Outcomes not allowing a flip past an H are not counted
      value += outcomes.scan(/(?=HH)/).length.to_f / outcomes.scan(/(?=H.)/).length   # HH per H_ this line
      counted_runs += 1
    end

    value/counted_runs
    => 0.416927548598704

    counted_runs
    => 750095