There are 2 red balls and 3 white balls in a pocket. The balls are identical except for their color. If one ball is drawn at random, what is the probability of drawing a red ball?
口袋里有2个红球和3个白球，球除颜色外完全相同，从中任意摸出1个球，摸到红球的可能性是多少
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>