#### Problem Statement: ECE Board November 1992

The probability for the ECE board examinees from a certain school to pass the subject of Mathematics is 3/7 and for the subject, Communications is 5/7. If none of the examinees fails both subjects and there are 4 examinees who pass both subjects, find the number of examinees from that school who took the examinations.#### Problem Answer:

There are**28 examinees**from a certain school who took the examinations.

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