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MathRevolution
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For me answer is coming out to be 5.
Explanation:

1)Maximum nos. of selection means maximum intersection (common numbers) of three interviewers, which cannot be more than 15 (i.e. minimum nos. recommended by any interviewer), when all 15 candidates will be commonly recommended by all interviewers.

2) For minimum nos. of selection, intersection nos. should be minimum.
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MathRevolution
In a hiring procedure, applicants should be recommended by three interviewers. Of 30 applicants, 15 applicants were recommended by the first interviewer. 17 applicants were recommended by the second interviewer. 20 applicants were recommended by the third interviewer. What is the possible least number of the applicants recommended by all of the three interviewers?

A. 0
B. 2
C. 4
D. 5
E. 10


* A solution will be posted in two days.

Please find the solution in the image attached

i have no idea how you solved this to me the math doesn't add up

Posted from my mobile device
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