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LoginA speaks truth in 75% cases and B in 80% of cases. In what percentage of cases they contradict each other in narrating the same incident?
Quantitative Aptitude PROBABILITY in Quantitative Aptitude 2 years ago
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manpreet![Tuteehub forum best answer]()
Best Answer
2 years ago
35%
Probability that A is TELLING the truth P(A)=75/100=3/4
Probability that B is telling the truth P(B)=80/100=4/5
Probability that A is LYING P(A’)=1-75/100 =25/100=1/4
Probability that B is lying P(B’)=1-80/100 =20/100=1/5
Contradiction means either of