$12$ defective pens are accidentally mixed with $132$ good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

  • A
    $11/12$
  • B
    $1/12$
  • C
    $12/132$
  • D
    $132/13$

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