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#1 Re: Help Me ! » Problem in SET THEORY » 2007-02-14 16:42:11

I think what u told is correct. Thanks a lot Toast.

#2 Re: Help Me ! » Problem in SET THEORY » 2007-02-13 20:27:58

Toast wrote:

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%

#3 Help Me ! » Problem in SET THEORY » 2007-02-13 17:02:18

thanu_hello
Replies: 4

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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