Attainable and unattainable combinations of PPC.

 Attainable and unattainable combinations of PPC : Those combination which are lie either on PPC or the inside of PPC are called attainable combinations, but those combinations which are lie outside the PPC are called unattainable combination of PPC. 

Figure-2

In the figure-2, A,B,C& Z are attainable combinations of PPC, where combinations A,B,C offer fuller utilisation of resources but combination Z offers underutilisation of resources, while on the other hand combination K is unattainable combination.

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