请帮忙解下这道题,拜谢Seven one-dollar bills are to be distributed amon
请帮忙解下这道题,拜谢
Seven one-dollar bills are to be distributed among Lucia, Gomez, and Domingo so that each person receives at least $1.
ColumnA ----The number of ways to distribute the bills so that at least one person receives at least $3
C-----B------- The total number of ways to distribute the bills
给的答案是相等,即ColumnA=ColumnB, 求解
Seven one-dollar bills are to be distributed among Lucia, Gomez, and Domingo so that each person receives at least $1.
ColumnA ----The number of ways to distribute the bills so that at least one person receives at least $3
C-----B------- The total number of ways to distribute the bills
给的答案是相等,即ColumnA=ColumnB, 求解
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