white and 5 black balls are placed in a box, the balls are identical except for their colour. If a ball is randomly drawn from it, what is the probability of getting a white ball?
在一个盒子里装了5个白球和5个黑球，球除颜色外完全相同．从中任意摸出一个球，摸到白球的可能性是多少．
<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

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