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I think what u told is correct. Thanks a lot Toast.
Remember that:
(A or B or C) = (A) + (B) + (C) - (A and B) - (A and C) - (B and C) + (A and B and C)
You want to find (A and B and C).
Also remember that (A or B or C) should be 5 less because 5% prefer none.
so is (A or B or C) = 95%
I have a problem, if u have a solution let me know.
In a sample survey it is found that 53% prefer brand A, 61% brand B, 60% brand C, 24% prefer AB, 35% prefer BC, 27% prefer AC and 5% prefer none. Find how many prefer all the three?
Please help me
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