In the transportation model, the number of demand places and supply places is n and m respectively. The number of constraints is ( ).
选项:m+n
m*n-1
m*n
m+n-1
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In the transportation model, the number of demand places and supply places is n and m respectively. The number of constraints is ( ).
选项:m+n
m*n-1
m*n
m+n-1
