Market Demand Is Given as Qd = 60 - P

Market demand is given as Qd = 60 - P. Market supply is given as Qs = 3P. In a perfectly competitive equilibrium, what will be price and quantity traded in the market?

A) price will be $20 and quantity will be 40
B) price will be $45 and quantity will be 15
C) price will be $40 and quantity will be 20
D) price will be $15 and quantity will be 45