Answer: 15
Explanation:
For profit to be maximized by a monopolist, the marginal revenue and marginal cost must be gotten.
P= 105-3Q
MC= 15
Since total revenue is price × quantity, TR= P×Q = (105-3Q)Q
= 105Q-3Q^2
MR= 105-6Q
Since we've gotten marginal revenue and marginal cost, we equate both together.
MR=MC
105-6Q = 15
6Q = 105-15
6Q=90
Divide both side by 6
6Q/6 = 90/6
Q= 15
The quantity that will maximise profit is 15