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Questions  >>  CBSE XII  >>  Math  >>  Probability
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Q)

P(A speaks truth is) = 4/5 . A coin is tossed. ‘'A'’ reports that a head appears. The probability that actually there was a head is.

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A)
((4/5)*(1/2))/((4/5)*(1/2)+((1/5)*(1/2))= 20/25
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