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June 29, 2020, 9:59 p.m.
A survey was conducted of 100 people to find out whether they had read recent issues of Golmal, a monthly magazine. The summarized information regarding readership in 3 months is given below:

A survey was conducted of 100 people to find out whether they had read recent issues of Golmal, a monthly magazine. The summarized information regarding readership in 3 months is given below:

Only September: 18;
September but not August: 23;
September and July: 8;
September:28;
July: 48;
July and August: 10;
none of the three months: 24

What is the number of surveyed people who have read exactly two consecutive issues (out of the three)?

  1. 7
  2. 9
  3. 12
  4. 14
  5. 17
quant
set-theory
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