There are 5 yellow balls and 3 red balls in a pocket, if you touch any one, what is the probability of getting a red ball?
口袋中有5个黄球和3个红球，任意摸一个，摸到红球的可能性是多少．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>