There are 3 red balls and 5 white balls in a pocket, what is the probability of finding the red ball (fill in the score).
一个口袋里装有3个红球，5个白球，摸出红球的可能是多少(填分数)．
<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>