In a city of 5000 families. It was found the 40% families read news paper A, 20% families read news paper B and 10% families read news paper C, 5% families read news paper A and B both, 3% read news paper B and C both, 4% read news paper A and C both. If 2% families read all three news paper A,B,C find the number of families who reads none of the newspaper A,B and C