A box contains coupons labelled $1,2, \ldots, 100$. Five coupons are picked at random one after another without replacement. Let the numbers on the coupons be $x_1, x_2, \ldots, x_5$. What is the probability that $x_1 > x_2 > x_3$ and $x _3 < x _4 < x _5 ?$

  • [KVPY 2013]
  • A

    $1 / 120$

  • B

    $1 / 60$

  • C

    $1 / 20$

  • D

    $1 / 10$

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