Venn Diagram Problem

Solution: Find the number of examinees who took the examinations

Find the number of examinees from that school who took the examinations

Problem Statement: ECE Board November 1992

The probability for the ECE board examinees from a certain school to pass the subject Mathematics is 3/7 and for the subject Communications is 5/7. If none of the examinees fails both subject 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.

Solution:

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