If a coin is tossed 6 times, 2 tails and 4 heads, the probability of heads on the seventh toss is ((())/(())).
投掷6次硬币，有2次反面向上，4次正面向上，那么投掷第七次硬币正面向上的可能性是((())/(()))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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