A fair die is tossed eight times. The probability that a third six is observed in the eight throw is:
  • A$\frac{\text{ }^7\text{C}_2\times5^5}{6^7}$
  • B$\frac{\text{ }^7\text{C}_2\times5^5}{6^8}$
  • C$\frac{\text{ }^7\text{C}_2\times5^5}{6^6}$
  • D$\text{None of these}$
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