Question: 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)?
100 – 24 = 76 had read at least one issue.
If x people read all the three issues, then (8 – x) people read only the September and July issues.
23 people read the September issue but not the August issue.
As 28 people read the September issue, [28 – (8 – 3) – 3 – 18] = 2 people read only the August and September issues.
As 10 people read the July and August issues, 10 – 3 = 7 people read only the July and August issues.
Hence, option (b).