A ball is randomly drawn from a pocket containing 1 red ball, 3 black balls and 5 blue balls. What is the probability of drawing a blue ball?
随意从放有1个红球，3个黑球和5个蓝球的口袋中摸出1个球，摸到蓝球的可能性为多少
<gadget id="calculator">1 + 3 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<result>5/9 = around 0.555556</result>