Xiao Ming is doing a coin toss game, 5 of the first 9 times are heads, what is the probability of the 10th head
小明做抛硬币游戏，前9次有5次正面向上，第10次正面向上的可能性是多少
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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