Math Is Fun Forum
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#1 2015-05-13 03:41:28
- Sethu000
- Guest
Is this question correct ? I am getting P(C only) as -5.
A publishing firm publishes newspapers A,B and C.In an effort to persuade advertisers to insert advertisements in these newspapers, the firm send out the following statement to possible advertisers:
A survey of representative sample of the whole population shows that:
Newspaper A is read by 26%
Newspaper B is read by 25%
Newspaper C is read by 14%
Newspaper A and B are read by 11%
Newspaper B and C are read by 10%
Newspaper C and A are read by 9%
Newspaper C only is read by 0%
Q1.The percentage of readers who read all 3 newspapers is
a)1 b)4 c)5 d)6
#2 2015-05-13 04:45:30
Re: Is this question correct ? I am getting P(C only) as -5.
Use the principle of inclusion exclusion
'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
I'm not crazy, my mother had me tested.
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#3 2015-05-13 06:02:46
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: Is this question correct ? I am getting P(C only) as -5.
Hi;
Q1) c
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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