Put 3 red balls and 11 yellow balls of the same color in a dark box, mix well and randomly pick a ball, what is the probability of getting a red ball?
在一个暗箱里放入除颜色外其它都相同的3个红球和11个黄球，搅拌均匀后随机任取一个球，取到是红球的可能性是多少
<gadget id="calculator">3 + 11</gadget>
<output>14</output>

<gadget id="calculator">3 / 14</gadget>
<output>3/14 = around 0.214286</output>

<result>3/14 = around 0.214286</result>