Question

In a city, 50% people read Newspaper A, 45% read Newspaper B and 25% read neither A nor B. What percentage of people read both the newspapers?
i. If 400 people read both the newspapers, find the population of the city.

Answer 1

25% doesnt read so 100 - 25 = 75 % read newspapers

now 75 - 50 = 25% read newspaper A only

75 - 45 = 30 % read B only

75 - (25 + 30) = 75 - 55 = 20% read both

20% read both

let x be the total population

20% of x = 400

x = 40000/20

x = 2000 is the total population