There are 6 red balls, 8 white balls and 1 yellow ball in the same shape in a paper box. If you touch any one, what is the probability of getting a yellow ball?
纸盒内有形状完全相同的6个红球、8个白球和1个黄球，任意摸一个，摸到黄球的可能性是多少．
<gadget id="calculator">6 + 8 + 1</gadget>
<output>15</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>