There are 10 identical cards with numbers 11 to 20 written on them. If you touch any one, what is the probability of getting an odd number?
有10张同样的卡片，分别写着11～20各数，任意摸一张，摸到奇数的可能性是多少
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

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