LOCALITIES = 3500 + 2400 + 3600 + 2500 + 4000 = 16000Average sales of Hindi newspapers in all localities = 16000/5 = 3200Averag sales of ENGLISH newspapers in localitites B and D = (2000 + 3000)/2 = 5000/2 = 2500Required ratio = 2500 : 3200 = 25 : 32