In a survey of 50 persons of an apartment it was found that 15 persons read magazine A,
16 persons read magazine B, 16 persons read magazine C, 8 persons read both A and B, 10 persons read both B and C, 7 persons read both C and A, 5 persons read all the three magazine.
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Given: In a survey of 50 persons of an apartment it was found that
15 persons read magazine A,
16 persons read magazine B,
16 persons read magazine C,
8 persons read both A and B,
10 persons read both B and C,
7 persons read both C and A,
5 persons read all the three magazine.
To Find : Persons who read none
Solution:
Total = A + B + C - A∩ B - A ∩C - B∩C + A∩B∩C + None
=> 50 = 15 + 16 + 16 - 8 - 10 - 7 + 5 + NOne
=> 50 = 27 + None
=> none = 23
Hence 23 reads none
So 23 reads no magazines
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Answer:
how many persons read only magazines A
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