There are 3 red balls, 2 yellow balls and 5 white balls of the same size in a closed box. If you touch any one, what is the probability of getting a white ball?
一个密闭的盒子里装有大小相同的3个红球、2个黄球和5个白球，任意摸一个，摸到白球的可能性是多少
<gadget id="calculator">3 + 2 + 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>