The correct answers are: The 3 Es are Effectiveness, Efficiency and Economy.
Effectiveness is the relationship between an organisation's outputs and its objectives (i.e. getting done what was supposed to be done).
Efficiency is the relationship between inputs and outputs (i.e. getting out as much as possible for what goes in).
Economy is attaining the appropriate quantity and quality of inputs at lowest cost (i.e. spending money frugally).
Enterprise, efficacy, expediency and endurance although perhaps relevant are all red herrings in this context.
