[計量] 請問一題補習班練習題
seven-one dollar bills are to be distributed among Lucia, Gomez, and Domingo
so that each person receives as least 1 dollar.
column A:the numver of ways to distribute the bills so that at least one
one person receives at 3 dollars.
column B: the total number of ways to distribute the bills
自己算的時候，想說A應該是三個人先取一個人拿三元然後再乘以三平方
然後B應該是三的四次方，可是答案竟然是C
想請問各位我哪裡漏算了嗎?
謝謝大家
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