text: # -*- coding: utf-8 -*-
  """
  Created on Sat Nov 29 19:22:00 2014
  
  @author: tvu
  """
  
  import math
  from __future__ import division
  
  -0.5*math.log(0.5, 2) - 0.5*math.log(0.5, 2)
  
  -(2/3)*math.log((2/3),2) - (1/3)*math.log((1/3), 2)
  
  1 - 3/4*(0.9184)