GWD20-14，没人问过的一个问题

Q14:

Six cards numbered from 1 to 6 are placed in an empty bowl.  First one card is drawn and then put back into the bowl; then a second card is drawn.  If the cards are drawn at random and if the sum of the numbers on the cards is 8, what is the probability that one of the two cards drawn is numbered 5 ?

 答案是2/5，理由是有5种组合，2，6； 6，2； 3,5； 5，3；4，4；，但是问题就出在这里，题目说 一共就6个卡，然而标明是4的卡片不就一张么？怎么会出来4，4的组合呢？

希望牛牛给予解释，谢谢了：）

First one card is drawn and then put back into the bowl

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