Draw any two of the five number cards marked 1, 2, 3, 4, 5. If you touch two odd numbers, you win obviously, and if you touch two even numbers, you win for nothing. Two people play this game, what is the probability of winning?
从标有1、2、3、4、5的五张数字卡片中任意摸两张，摸到两张奇数算明明赢，摸到两张偶数算白白赢．两人玩这个游戏，明明赢的可能性占多少．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>