1. What is Demand?
First, imagine this:
You go to a shop with ₹50.
You see chocolates.
- If chocolate costs ₹10 → you buy 5
- If chocolate costs ₹5 → you buy 10
So, when price falls → you buy more
When price rises → you buy less
This is called Demand.
2. What is Elasticity of Demand?
Now comes the main idea.
Elasticity of Demand = How much demand changes when price changes
In simple words:
👉 “If price changes, how strongly do people react?”
3. Real-Life Story (Case)
Case 1: Ice Cream
- Price = ₹20 → you buy 2 ice creams
- Price = ₹10 → you buy 6 ice creams
Big change in buying!
👉 Demand changed a lot → Elastic Demand
Case 2: Salt
- Price = ₹20 → you buy 1 packet
- Price = ₹40 → you still buy 1 packet
No big change!
👉 Demand hardly changed → Inelastic Demand
4. Bujho & Paheli Time
Bujho asks:
“If the price of pizza increases, will everyone stop eating pizza?”
Paheli says:
“No, some people will still buy it, but maybe less.”
👉 So demand changes, but not always equally
5. Types of Elasticity (Very Simple)
(1) Elastic Demand (Very Sensitive)
- Small price change → Big change in demand
- Example: ice cream, clothes, toys
(2) Inelastic Demand (Not Sensitive)
- Big price change → Small change in demand
- Example: salt, medicines, petrol
6. Why Does This Happen?
Let’s understand with reasons:
(a) Necessity vs Luxury
- Salt → necessary → you must buy → inelastic
- Ice cream → optional → can skip → elastic
(b) Availability of Substitutes
- Tea has coffee → you can switch → elastic
- Petrol has no easy substitute → inelastic
(c) Money spent
- Chocolate → small expense → elastic
- Car → big expense → think more → elastic
7. Simple Formula (Don’t Fear)
Elasticity =
Change in Quantity ÷ Change in Price
Meaning:
👉 Compare how much buying changed vs price change
8. Mini Case Study
A shopkeeper increases price of chips:
- Before: 10 packets sold
- After: 4 packets sold
Big drop → Elastic demand
Now milk price increases:
- Before: 5 litres
- After: 4.8 litres
Small drop → Inelastic demand
9. Final Easy Summary
- Elasticity tells: “How strongly people react to price change”
- If demand changes a lot → Elastic
- If demand changes very little → Inelastic
10. One Last Bujho-Paheli Question
Bujho:
“If the price of water doubles, will people stop drinking water?”
Think like Paheli:
No, because water is necessary.
👉 So water has inelastic demand
Higher Demand Elasticity
“Higher demand elasticity means customers are more conscious (aware and reactive) to changes in that variable.”
👉 Variable usually means price, but it can also be income or other factors.
2. Simple Meaning
- Higher elasticity = people react a lot when something changes
- Lower elasticity = people react very little
👉 So, “more conscious” means:
They quickly notice the change and change their buying behavior
3. Real-Life Example (Case)
Case: Price of Burgers
- Price = ₹50 → you buy 2 burgers
- Price = ₹80 → you buy 0 burgers
👉 Big change in buying
So customers are:
- noticing the price increase
- reacting strongly
👉 This means high elasticity
4. Opposite Case
Case: Medicine
- Price = ₹100 → you buy it
- Price = ₹150 → you still buy it
👉 You cannot avoid it
So customers:
- notice price change
- but cannot react much
👉 This means low elasticity
5. Bujho & Paheli Style
Bujho asks:
“If the price of your favorite chocolate increases a little, will you reduce buying?”
Paheli says:
“Yes, I might buy less or switch to another brand.”
👉 That means:
- Paheli is very conscious of price changes
- Demand is elastic
6. Key Idea in One Line
👉 Higher elasticity = customers are very sensitive and quickly change their demand when something changes
7. Easy Comparison Table
| Situation | Reaction | Elasticity |
|---|---|---|
| Stop buying quickly | Strong reaction | High elasticity |
| Continue buying | Weak reaction | Low elasticity |
8. Final Understanding
So the statement means:
👉 When elasticity is high,
customers are:
- alert
- sensitive
- responsive
to changes like price, income, etc.
9. One Thinking Question
If petrol price increases slightly and people still buy almost same quantity,
are they very conscious of price change?
👉 Think carefully:
They notice it, but don’t change behavior much → Low elasticity