There are 5 red balls, 3 white balls, and 2 green balls in a box. If you touch any one, what is the probability that the one you touch is not a green ball?
盒中有5个红球，3个白球，2个绿球，任意摸一个，摸到的不是绿球的可能性是多少
<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 + 3 + 2</gadget>
<output>10</output>

<gadget id="calculator">8 / 10</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>