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Cardinality of Relationship
Only one entity of the first set is linked to only one entity of the second set. E.g. A teacher teaches a student. Only one teacher is teaching only one learner.
Only one entity of the first set is related to many entities of the second set. E.g. A teacher teaches learners.
Multiple entities of the first set are related to many entities of the second set. E.g. Teachers teach a learner.
Multiple entities of the first set are related to multiple entities of the second set. E.g. Teachers teach learners
HOW TO SOLVE THE LP Problems by simplex method?z=x1+-3x2+2x3
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