Answers

2014-06-02T18:13:49+05:30
1400 people read neither of the papers.
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2014-06-02T19:12:40+05:30
No. of people read newspaper A is n(A) = 5400
No. of people read newspaper B is n(B) = 4700
No.of people read both A and B is n(A ∩ B) = 1500
No. of people read either of news paper A or B is n(A U B) =?
From
n(A U B) = n(A) + n(B) - n(A 
 ∩ B) 
n(A U B) = 5400 + 4700 - 1500
n(A U B) = 10,100 - 1500 = 8600
Therefore no. of people neither reading newspaper A & B = 10,000 - n(A U B)
                                                                                   = 10,000 - 8600
                                                                                   = 1400
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