In a survey of 60 people, it was found that 25 people read newspaper H, 26 read newspaper T, 26 read newspaper I, 9 read both H and I, 11 read both H and T, 8 read both T and I, 3 read all three newspapers. Find: the number of people who read at least one of the newspapers.

Answer

Therefore,
i) number of people who read atleast one news paper = a + b + c + d + e + f + g = 52
ii) number of people who read exactly one news paper = a + b + c = 30.