A pack of playing cards was found to contain only 51 cards. If the first 13 cards which are examined are all red, then the probability thatthe missing card is black, is:
  • A$\frac13$
  • B$\frac23$
  • C$\frac12$
  • D$\frac{^{25}{\text{C}_{13}}}{^{51}{\text{C}_{13}}}$
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