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Answer» What is Efficient mean? Efficiency is the extent to which time or effort is well used for the intended task or purpose. Efficiency may also refer to: Efficiency (aerodynamics), the amount of lift divided by the aerodynamic dragEfficiency (apartment), a one-room apartmentEfficiency (basketball), a statistical benchmark to compare the overall value of playersEfficiency (economics), a situation in which nothing can be improved without something else being hurtEfficiency (fair division), any changes made to assist one person would harm anotherEfficiency (finance), non-mean-variance portfolio analysis, a way of showing that a portfolio is not efficientEfficiency (mechanical)Efficiency (network science), a measure of how efficiently a network exchanges informationEfficiency (statistics), a measure of quality of an estimator, experiment, or testEnergy efficiency (physics), the ratio of power consumed to useful power output reference
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