In Jane\textquotesingle s school, there are $30$ students born in April, and each of them was born in a different day. What is the probability of choosing one student who was exactly born in the first ten days of April? 
选项为:A:$\frac {1}{30}$  B:$\frac {1}{3}$  C:$\frac {1}{4}$  D:$\frac {1}{15}$  E:$\frac {1}{10}$  请回答其中一个选项.