Xiao Ming plays the game of tossing a coin. He has tossed a coin 49 times and all of them are heads. What is the probability of him throwing a coin for the 50th time?
小明玩投硬币的游戏，已经扔了49次，都是正面朝上，他第50次扔出正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>