# Eco402 Assignment No 1 Solution 2015 Best

EQUILIBRIUM

Equilibrium is a state in which there are no shortages and surpluses; in other words the quantity

demanded is equal to the quantity supplied.

Equilibrium price is the price prevailing at the point of intersection of the demand and supply curves; in

other words, it is the price at which the quantity demanded is equal to the quantity supplied.

Equilibrium quantity is the quantity that clears the market; in other words, it is it is the quantity at which

the quantity demand is equal to the quantity supplied.

ALGEBRAIC REPRESENTATION OF EQUILIBRIUM

If we have following demand and supply function

Qd = 100 – 10 P

Qs = 40 + 20 P

Supply Curve

Quantity (Q)

Price (P) Demand Curve

Qd = Qs

In equilibrium,

Qd = Qs

Therefore,

100 - 10P = 40 + 20P

20P + 10P = 100 - 40

30P = 60

P = 60/30

P = 2

Putting the value of price in any of demand and supply equation,

Q = 100 – 10x2 (or 40 + 20x2)

Q = 100 – 20

Q = 80

The equilibrium price is 2 and the equilibrium quantity is 80

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### MTH202 Assignment Question No 1

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### MTH202 Assignment Question No 2

[Marks: 05]

Suppose that 250 faculty members can speak French (F) and 60 can speak Russian (R), while only 10 can speak both French and Russian. Using Inclusion-exclusion Principle find how many faculty members can speak either French or Russian?

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