In a town of 1000 families it was found that 40% families buy newspaper A, 20% families buy newspaper B, 10% families buy newspaper C, 5% buy A and B, 3% buy B and C, 4% buy A and C. If 2% families buy all the three newspapers, find (i) the number of families which buy newspaper A only (ii) the number of families which buy none of the newspapers A, B , C (iii) the number of families which buy atleast one of the newspapers.