A bag contains 10 yellow balls, 4 black balls and 6 red balls of the same size. If a ball is randomly drawn from a bag, what is the probability that it is red?
一个袋子中放有同样规格的10个黄球，4个黑球，6个红球．随意从袋子中摸出一个球，摸出是红球的可能性是多少．
<gadget id="calculator">10 + 4 + 6</gadget>
<output>20</output>

<gadget id="calculator">6 / 20</gadget>
<output>3/10 = around 0.3</output>

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