∵ There are $$10$$ possible situations. However, there\textquotesingle s only one time for him to get the first digit right at the first try.  ∴ The probability that he can get the first digit right at the first try is $$\frac{1}{10}$$.  So $$\text{D}$$ is the answer. 
The password for a bankbook has six digits (digits can be $$0$$). Mr. Wang forgets the first digit. The probability that he can get the first digit right on his first try is ． 

(1) $$\frac{1}{6}$$ 
(2) $$\frac{1}{9}$$ 
(3) $$\frac{1}{10}$$ 
(4) $$\frac{1}{12}$$ 