In a town of 10,000 families it was found that 40% families buy newspaper A, 20% families buy newspaper B, and 10% families buy newspaper C. 5% families buy A and B, 3% buy B and C and 4% buy A and C. If 2% families buy all the three newspapers, find the number of families which buy (i) A only (ii) B only (iii) none of A, B and C