There are 10 identical balls in the pocket, respectively marked with numbers 1, 2, 3, ... 10, and one ball is randomly selected from them. What is the probability that the number of this ball is divisible by 3?
口袋里有10个相同的球，分别标有号码1、2、3、…10，从中任取一个球，此球号码能被3整除的可能性有多少．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>