HCU MCA 2014 Paper

In a town of 10,000 families, it was found that 40% families buy newspaper A, 20% buy newspaper B, 10% buy newspaper C, 5% buy A and B, 3% buy B and C, and 4% buy A and C. If 2% buy all the newspapers, then the number of families who do not buy any of the newspapers A, B, C is
(HCU-2014)