Jimei tosses a coin 9 times, 5 times the coin comes up heads, what is the probability of tails coming up when he tosses the coin for the 10th time?
晋美抛9次硬币，有5次是硬币的正面朝上，他第10次抛出硬币时，出现反面朝上的可能性是多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>