Chapter 3.1: Cung & cầu - cân bằng thị trường - Bài tập

The supply and demand functions for product X are as follows:
P= Qs+5 (supply function)
P = -1/2 * QD + 20 (demand function).
Find the equilibrium price and quantity?

• Q = 5; P = 10

• Q = 10; P = 15

• Q = 8; P = 16

• Q = 20; P = 10

When the price of good Y: Py = 4, the demand for good X: Qx = 10, and when Py = 6, Qx = 12, with other factors held constant, what can we conclude about the relationship between X and Y?

• Complementary goods.

• Substitute goods.

• Both substitute and complementary goods.

• Unrelated.

The market for product A has the following supply and demand functions:

Pd = 60 - 1/3 * Qd (demand function)

Ps = 1/2 * Qs - 15 (supply function)
The equilibrium price and quantity for product A are:

• P = 30; Q = 90

• P = 20; Q = 70

• P = 40; Q = 60

• All are incorrect

When the income of the population increases, with all other factors unchanged, how will the price and new equilibrium quantity of secondary goods be affected?

• Lower price and larger quantity.

• Higher price and unchanged quantity.

• Higher price and smaller quantity.

• Lower price and smaller quantity.

Due to many people migrating from provinces to Ho Chi Minh City, what will happen to the demand curve for rice in Ho Chi Minh City?

• Shifts to the left.

• Shifts to the right.

• No shift.

• No option is correct.

Answer explanation

Vì nhiều người nhập cư vào TPHCM, nhu cầu gạo tăng, dẫn đến đường cầu mặt hàng gạo sẽ dịch chuyển sang phải.

Assuming the demand function for the "tomato" market is P = -0.5Q + 40. The supply of agricultural products in the market is 40. What is the equilibrium price in the market?

• P = 10

• P = 20

• P = 40

• None of the above

The "beverage" market is currently in a state of equilibrium. However, during the summer, the hot weather increases the demand for "beverages", assuming the supply curve of the market remains unchanged. So, what will be the new equilibrium price and quantity of this market?

• P increases; Q decreases

• P increases; Q increases

• P unclear; Q increases

• P increases; Q decreases

Due to climate change, the Earth is warming increasingly, causing failures in crop production and reducing rice yields in many regions of India in 2023, while the demand for rice from the Indian population remains unchanged. How does this affect the prices and equilibrium quantity of the domestic rice market in India?

• P increases; Q unclear

• P decreases; Q decreases

• P increases; Q decreases

• None of the answers are correct.

When the price of the product "Coca" changes, assuming all other factors remain constant, what will this lead to?

• The demand curve shifts to the right

• The demand curve shifts to the left

• A movement along the demand curve

• The supply curve shifts to the right.

Which factor does not cause the market supply curve to shift left or right?

• Product price

• Input prices & Level of production technology

• Number of sellers

• Expectations of sellers