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Cardinal Approach (Utility Analysis)

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Topics

  • Introduction
  • Key Concepts 
  • Consumer Equilibrium
  • Real-Life Application
  • Key Point Summary
CISCE: Class 12

Introduction

Cardinal Utility Analysis is a theory that explains how consumers decide what and how much to buy, aiming to maximise their satisfaction (utility) using their limited income. Utility is measured as numbers (1, 2, 3…), meaning the benefit or satisfaction gained from consuming goods can be quantified. This helps explain why demand rises when the price falls.

CISCE: Class 12

Key Concepts

Concept Definition Formula/Example
Utility Satisfaction gained from consuming a product Eating an apple gives you “10 utils” of utility
Total Utility (TU) Total satisfaction from all units consumed TU₃ (three bananas) = 22 utils
Marginal Utility (MU) Extra satisfaction from consuming one more unit MU₃ = TU₃ – TU₂ (22 – 18 = 4)
CISCE: Class 12

Consumer Equilibrium

  • Consumers try to get the best value for their money by balancing spending so the marginal utility per rupee spent is equal for all goods.
  • This balancing is called “equilibrium”, and it lets consumers maximise overall satisfaction.
CISCE: Class 12

Real-Life Application

Imagine eating chocolate:

  • The first chocolate gives the most joy.
  • The second and third still taste good, but they are slightly less fun.
  • By the fourth or fifth, the excitement drops—and you might not want any more.
CISCE: Class 12

Key Point Summary

  • Utility can be measured in numbers (“cardinal” units).
  • Total utility: All satisfaction from consuming a product.
  • Marginal utility: The change in satisfaction from one more unit.
  • Consumer equilibrium: Spend money so that every rupee gives the same satisfaction across products.

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