Question
A speaks truth in 75% of cases And B is 80% of cases.
What is the probability that they likely to contradict each other, narrating the same incident.Solution
Probability of A speaks truth =75% = ¾ And P (not speaks truth) =25% =1/4 Probability of B speaks truth = 80%=4/5 And P (not speaks truth) = 20% =1/5 Probability = (3/4×1/5) +(1/4×4/5) =3/20 +4/20 =7/20
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