In Xiao Ming's schoolbag, there are 3 Chinese exercise books, 5 math exercise books, and 3 English exercise books. If one is taken out randomly, what is the probability of taking out the math exercise book?
小明的书包中，有3本语文练习本，5本数学练习本，3本英语练习本，从中任意拿出一本，拿出数学练习本的概率是多少．
<gadget id="calculator">3 + 5 + 3</gadget>
<output>11</output>

<gadget id="calculator">5 / 11</gadget>
<output>5/11 = around 0.454545</output>

<result>5/11 = around 0.454545</result>