這題是98年北一女理組段考題
"社團中有兩對雙胞胎兄弟,兩對三胞胎兄弟,其中四人同坐一輛計程車,車中恰有兩人
為兄弟,則可能有幾種不同的組合?"
網路上的答案為74
可是我怎麼算都是138
可以請高手幫我看看哪裡出錯了嗎
感謝^^
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