Put 8 white ping-pong balls and 2 yellow ping-pong balls in a bag, and draw out one randomly at a time. If you touch 100 times in this way, what is the approximate number of yellow ping-pong balls drawn out of the total number of times?
把8个白色乒乓球和2个黄色乒乓球放在一个包里，每次任意摸出1个，这样摸100次，摸出黄色乒乓球的次数大概占总数的多少．
<gadget id="calculator">2 + 8</gadget>
<output>10</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>