Re: [計量] 問一題 感覺有點難
※ 引述《jerryhy303 (河馬)》之銘言：
: 題目
: Two cubical dice each have removable numbers 1 through 6. The tweleve
: numbers on the two dice are removed, put into a bag, then drawn one at
: a time and randomly reattached to the faces of the cubes, one number to
: each face. The dice are then rolled and the numbers on the two top faces
: are added. What is the probability that the sum is 7?
: 排列組合好難喔~ 可是機考會出那麼難的嗎
不管第一個骰子上面的數字是多少，剩下11個數字有兩個可以跟他加起來變成7
所以答案是2/11。
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