Ans: B
Note that for the probability of any events must be a number between $0$ and $1$ inclusive. Only the answer B $\dfrac{2005}{2006}$ lies between $0$ and $1$. Therefore, the answer is B.
Note that for the probability of any events must be a number between $0$ and $1$ inclusive. Only the answer B $\dfrac{2005}{2006}$ lies between $0$ and $1$. Therefore, the answer is B.
