There are 1 red ball, 3 white balls, and 2 black balls in a box. If a ball is randomly drawn, what is the probability of drawing a red ball?
盒子里有1个红球，3个白球，2个黑球，任意摸出一个球，摸到红球的可能性是多少
<gadget id="calculator">1 + 3 + 2</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>