Question

In a town of 10,000 families it was found that 40% families buy newspaper A,
20% families buy newspaper B, 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
(a) The number of families which buy newspaper A only.
(b) The number of families which buy none of A, B and C

Answer 1

@dan815

Answer 2

Sorry Sir, but, In our country it is taught in 11th standard.