There are 6 red balls and 5 white balls in a box, what is the probability of randomly drawing a white ball?
盒子里有6个红球，5个白球，任意摸出一个白球的可能性是多少．
<gadget id="calculator">6 + 5</gadget>
<output>11</output>

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

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