If a coin is tossed 3 times and one lands on the bottom and two tails, what is the probability that the coin will land tails on the 4th toss?
掷3次硬币，有1次下面朝上，2次反面朝上，那么，掷第4次硬币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>