If $P\,(A) = \frac{1}{4},\,\,P\,(B) = \frac{5}{8}$ and $P\,(A \cup B) = \frac{3}{4},$ then $P\,(A \cap B) = $

  • A

    $\frac{1}{8}$

  • B

    $0$

  • C

    $\frac{3}{4}$

  • D

    $1$

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  • [IIT 1990]