box contains 10 red balls, 10 white balls, 10 yellow balls and 10 blue balls of the same size. If a ball is drawn from it, the probability of drawing a yellow ball is ((())/(())).
箱内装有大小相同的红球、白球、黄球和蓝球各10个．如果从中摸出一个球，摸到黄球的可能性是((())/(()))．
<gadget id="calculator">10 + 10 + 10 + 10</gadget>
<output>40</output>

<gadget id="calculator">10 / 40</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>