Xiaohua tosses a coin 9 times in a row, 5 times heads up and 4 times tails up. What is the probability that he lands tails on the 10th flip of the coin?
小华连续投掷9次硬币，正面朝上5次，背面朝上4次．那么他第10次投掷硬币时背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>