The probability that speaks truth is 4/5, while this probability for is 3/4. The probability that they contradict each other when asked to speak on a fact is Option 1) 7/20 Option 2) 1/5 Option 3) 3/20 Option 4) 4/5

As we learnt in

Probability of occurrence of an event -

Let S be the sample space then the probability of occurrence of an event E is denoted by P(E) and it is defined as

- wherein

Where n repeated experiment and E occurs r times.

Probability of A speakig truth , P(AT) =

Probability of F speakig false  P (AF) =

Probability of B speakig truth P (BT)

Probability of B speakig truth false P (BF)

Probability

Option 1)

7/20

Correct

Option 2)

1/5

Incorrect

Option 3)

3/20

Incorrect

Option 4)

4/5

Incorrect

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