1.
In a town of 10,000 families, it was found that 40% families buy newspaper A, 20% buy
newspaper B and 10% 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 newspapers, find the number of families which buy (i) A only (ii)
none of A, B, and C.