Put 8 red pencils and 2 blue pencils in a bag, and let you touch it once each time. After touching it 20 times, what is the approximate proportion of the total number of times you touch the blue pencils?
把8支红铅笔和2支蓝笔放在一个包里，让你每次往里摸一次，这样摸了20次，摸出蓝铅笔大约占总次数的多少．
<gadget id="calculator">8 + 2</gadget>
<output>10</output>

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

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