Economics (AS & A Level) · May / June 2022 · Paper 13 · Question 10

Goods X, Y and Z all have downward-sloping demand curves and upward-sloping supply curves. Good X is in joint supply with good Y and in joint demand with good Z. There is an increase in the demand for good X. What will happen to the prices and sales of goods Y and Z?

1. Agood Y price: fall, sales: fall; good Z price: rise, sales: rise
2. Bgood Y price: fall, sales: rise; good Z price: rise, sales: rise
3. Cgood Y price: rise, sales: fall; good Z price: fall, sales: rise
4. Dgood Y price: rise, sales: rise; good Z price: fall, sales: fall

As printed in the paper