There are 3 red balls and 5 white balls in a pocket, which are identical except for their colour. Draw a ball at random, what is the probability of drawing a red ball
口袋里有3个红球和5个白球，球除颜色外完全相同．从中任意摸出一个球，摸出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>