There are 5 red balls, 2 yellow balls, and 3 white balls in a bag, all of which are the same except for the color. If you touch any one, what is the probability of getting a red ball?
一个袋子里有除颜色外其余均相同的5个红球、2个黄球、3个白球，任意摸一个，摸到红球的可能性是多少．
<gadget id="calculator">5 + 2 + 3</gadget>
<output>10</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>