From a deck of 52 (no big or small king) poker cards, if you take any one, the probability of drawing a 9 is: how much.
从一副52张(无大小王)扑克牌中，任取一张，则抽到9的可能性大小是：多少．
<gadget id="calculator">4 / 52</gadget>
<output>1/13 = around 0.076923</output>

<result>1/13 = around 0.076923</result>