If you touch a ball in a bag containing 3 yellow balls and 2 red balls, and draw 2 balls every time, what is the probability that the 2 balls you touch are both red balls?
在一个装有3个黄球和两个红球的袋子中摸球，每次摸出两个球，摸到的两个球都是红球的可能性大小为多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>