Solution: Find the number of examinees who took the examinations

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.

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:

Online Questions and Answers in Venn Diagram, Permutation, Combination and Probability


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