JEE Math Practice Question
The probability that $$A$$ speaks truth is $${4 \over 5},$$ while the probability for $$B$$ is $${3 \over 4}.$$ The probability that they contradict each other when asked to speak on a fact is :
- A.$${4 \over 5}$$
- B.$${1 \over 5}$$
- C.$${7 \over 20}$$
- D.$${3 \over 20}$$
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