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24 Mar 2004, 08:02
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Chances of A saying the truth is 70% and B saying the truth is 40%. Replying to a question what are the chances that they will contradict.
(1) 45% (2) 60% (3) 28% (4) None
(1) 45% (2) 60% (3) 28% (4) None
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24 Mar 2004, 08:22
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--------------A----------B
Truth--------70%---------40%
Lied---------30%---------60%
Probability that they contradict is if A says truth and B lied and vice-versa
.7*.6 + .4*.3 = .54
E is answer
Truth--------70%---------40%
Lied---------30%---------60%
Probability that they contradict is if A says truth and B lied and vice-versa
.7*.6 + .4*.3 = .54
E is answer
24 Mar 2004, 08:37
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Hi,
Just a thought ......
If both are lying, can we be sure that they will contradict?
So, is it better to mark 'None' for such a question always even if '.54' was one of the options?
-V
Just a thought ......
If both are lying, can we be sure that they will contradict?
So, is it better to mark 'None' for such a question always even if '.54' was one of the options?
-V
can you show an instance when both contradict while they are lying? I don't think both can contradict AND lie on the same question. Both CAN give diff. answers in their lies but not really contradict... 
