Question 1164083
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The total number of students in the school is  n(E) + n(E') = 130 + 95 = 225.


The number of those who was not interviewed is n([(W U F U E)']) = 10  (given).


Hence, the number of those who WAS interviewed is the COMPLEMENT  225 - 10 = 215.    


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All the rest info in the post is excessive, non-necessary and irrelevant.
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