There are four playing cards, namely K and J of spades and Q and 8 of hearts, all with their backs facing up. If two cards are chosen randomly, what is the probability of getting both hearts?
有四张扑克牌，分别是黑桃K、J和红桃Q、8，背面都朝上．从中任意取两张，取到都是红桃的可能性是多少
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>