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Question
The probability that A speaks truth is 3/5 and that of B speaking truth is 4/7. What is the probability that they agree in stating the same fact?
Options:
A .  18/35
B .  12/35
C .  17/35
D .  19/35
E .  None of these
Answer: Option A


If both agree stating the same fact, either both of them speak truth of both speak false.Probability = 3/5 * 4/7 + 2/5 * 3/7= 12/35 + 6/35 = 18/35


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