Mathematics

Problem

13. Probability that A speaks truth is

\frac{4}{5}

. A coin is tossed. A reports that a head appears. The probability that actually there was head is (A)

\frac{4}{5}

(B)

\frac{1}{2}

(C)

\frac{1}{5}

(D)

\frac{2}{5}

(A)

\frac{4}{5}

(B)

\frac{1}{2}

(C)

\frac{1}{5}

(D)

\frac{2}{5}