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12 Nov 2007, 04:56
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Q. In a certain survey, each of 800 people expressed their attitude to A and B. They can say yes, no, or unsure. If 200 people said yes to A but not to B, how many people said yes to either A or B?
The answer has been out as 600 by discussion,, but do you think this question is not complete? Anybody comments please ..
The answer has been out as 600 by discussion,, but do you think this question is not complete? Anybody comments please ..
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13 Nov 2007, 09:13
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Yes No Unsure
A 500 200 100
B 400 300 100
Q. In a certain survey, each of 800 people expressed their attitude to A and B. They can say yes, no, or unsure. If 200 people said yes to A but not to B, how many people said yes to either A or B?
OA: 600
Any solutions for this?
A 500 200 100
B 400 300 100
Q. In a certain survey, each of 800 people expressed their attitude to A and B. They can say yes, no, or unsure. If 200 people said yes to A but not to B, how many people said yes to either A or B?
OA: 600
Any solutions for this?
13 Nov 2007, 09:37
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pretttyune
Here's a possible explanation.
Forget the people who said no or were unsure.
If 200 people said yes to A but not to B and 500 people said yes to A overall, then 500-200=300 people said yes to A and B.
If 300 people said yes to B and A and 400 people said yes to B overall, then 400-300=100 people said yes to B but not to A.
Therefore number of people who said yes to A or B would be 200+300+100=600.
