A bag contains 1 white ball and 5 black balls, each of the same shape and size. If a ball is randomly drawn from it, what is the probability of drawing a white ball?
袋中有1个白球，5个黑球，每个球的形状和大小相同．从中任意摸出一个球，摸到白球的可能性为多少．
<gadget id="calculator">1 + 5</gadget>
<output>6</output>

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

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