[計量] 問一題數學
pp2練習到的題目
Seven one-dollar biils are to be distributed among
Lucia, Gomez, and Domingo so that each person recieves at leas $1.
A.The number of ways to distribute the bills so that at least one person
recieves at least $3.
B.The total number of ways to distribute the bills.
答案是 A.B equal
...請問A B是都要假設每人至少$1嗎，有點搞混了@@
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