Xiao Yu tosses a coin, 4 of the first 5 times it is heads; he tosses the 6th time, what is the probability of heads this time?
小雨抛一枚硬币，前5次中有4次正面向上；他抛第6次，这一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>