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Quantitative Aptitude

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Permutation, Combination & Probability

Question
10 out of 20
 

A speaks truth in 60 percent cases and B speaks truth in 70 percent cases. The probability that they will say the same thing while describing a single event is



A 0.56
B 0.54
C 0.38
D 0.94
E None of These

Ans. B The condition in which they say same thing is either both speak true or both speak false.

So probability=0.6*0.7+0.4*0.3=0.54

Permutation, Combination & Probability Flashcard List

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