Question #112774
Given the constraints
A+B+C<or=24,B+C>or=8and A>or=0,C>or=0.
Maximize24-A-B

A:amount of time spent on schoolwork
B:amount of time spent on fun
C: amount of time spent on pay work
1
Expert's answer
2020-04-28T18:54:19-0400

here in the question only A and C are give as A,C0A,C\ge0 . But the B is amount of time spent on fun and time also cannot be negative and it should be B0.B\ge 0.


This problem is converted to solve using simplex(Big-M) method and it is follows.

maximize 24AB+0S1+0S2Mamaximize \ 24-A-B+0S_1+0S_2-Ma

subject to,A+B+C+S1=24B+CS2+a =8A,B,C0subject\ to,\\ A+B+C+S_1\hspace{4 em}=24\\ B+C\hspace{4 em}-S_2+a\ =8\\ A,B,C\ge0


iteration-1



a goes out from the basis and C comes in.

iteration-2

since ZCj0since\ Z-C_j\ge 0  optimum solution is occurred.

maximum is occurred when,

A=0,B=0,C=8 and Maximum is 24



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