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Probability that A speaks truth is 4/...

Probability that A speaks truth is `4/5` . A coin is tossed. A reports that a appears. The probability that actually there was head is (A) `4/5` (B)`1/2` (C) `1/5` (D) `2/5`

A

`1/5`

B

`4/5`

C

`3/5`

D

`2/5`

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The correct Answer is:
B
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