There are 6 red balls, 2 white balls and 4 yellow balls in a pocket which are all the same except for different colors. One ball is randomly drawn from among them. What is the probability of drawing a red ball?
口袋里有除颜色不同其它都相同的6个红球、2个白球和4个黄球，从中任意摸出1个球，摸出红球的可能性是多少．
<gadget id="calculator">4 + 2 + 6</gadget>
<output>12</output>

<gadget id="calculator">6 / 12</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>