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 mpnths is given below:
Only September : 18; September but not August : 23;
July : 48; July and August : 10;
September and July : 8;
September : 28;
None of the three months : 24.
What is the number of surveyed people who have read exactly two consecutive issues (out of the three)?