Andrew's Demand for Fish Is: Q_A=12- 3P

Multiple Choice

Andrew's demand for fish is: Q_A=12- 3P. Betty's demand for fish is: Q_B=16- 4P and Cathy's demand for fish is: Q_C=20- 5P. Q is the number of pounds of fish and P is the price of fish per pound. If Andrew, Betty and Cathy are the only people living in their village, and if the price of fish is P=$1 per pound, what is the total market demand for fish in the village?

A) Q=12.
B) Q=36.
C) Q=16.
D) Q=20.