question_answer

Robert speaks truth in 60% of cases and Mary speaks truth in 90% of cases. If both of them are asked to give a statement, then the probability that they contradict each other?s statements is:

A) \[\frac{19}{50}\]                                  

B) \[\frac{29}{50}\]

C) \[\frac{31}{50}\]                                  

D) \[\frac{21}{50}\]

E) None of these