Consider a perfectly competitive market with market supply Qs=P and market demand Qd=100-P. imposes a tax of $10 per unit on this market, to be paid...

21. Consider a perfectly competitive market with market supply Qs=P and market demand Qd=100-P.

imposes a tax of $10 per unit on this market, to be paid by the consumer. What is total quantity traded in the market after the tax has been imposed?

a. 50

b. 55

c. 45

d. 100