Fran runs a doughnut shop in a tiny 3-person town. The table below shows the quantity demand by the three townspeople at various prices. $$\begin{array} { | c | c | c | c | }
\hline \begin{array} { c }
\text { Price Per } \
\text { Doughnut }
\end{array} & \begin{array} { c }
\text { Quantity } \
\text { Demanded } \
\text { by Al }
\end{array} & \begin{array} { c }
\text { Quantity } \
\text { Demanded } \
\text { by Betty }
\end{array} & \begin{array} { c }
\text { Quantity } \
\text { Demanded by } \
\text { Carol }
\end{array} \
\hline 10 \text { cents } & 10 & 4 & 6 \
\hline 25 \text { cents } & 9 & 2 & 5 \
\hline 35 \text { cents } & 7 & 1 & 5 \
\hline 50 \text { cents } & 5 & 0 & 4 \
\hline
\end{array}$$ When the price of a doughnut is 50 cents, what is the market demand for doughnuts?
A)31 doughnuts
B)20 doughnuts
C)9 doughnuts
D)5 doughnuts

Question

Fran runs a doughnut shop in a tiny 3-person town. The table below shows the quantity demand by the three townspeople at various prices. $$\begin{array} { | c | c | c | c | } 
\hline \begin{array} { c } 
\text { Price Per } \
\text { Doughnut }
\end{array} & \begin{array} { c } 
\text { Quantity } \
\text { Demanded } \
\text { by Al }
\end{array} & \begin{array} { c } 
\text { Quantity } \
\text { Demanded } \
\text { by Betty }
\end{array} & \begin{array} { c } 
\text { Quantity } \
\text { Demanded by } \
\text { Carol }
\end{array} \
\hline 10 \text { cents } & 10 & 4 & 6 \
\hline 25 \text { cents } & 9 & 2 & 5 \
\hline 35 \text { cents } & 7 & 1 & 5 \
\hline 50 \text { cents } & 5 & 0 & 4 \
\hline
\end{array}$$ When the price of a doughnut is 50 cents, what is the market demand for doughnuts?
A)31 doughnuts
B)20 doughnuts
C)9 doughnuts
D)5 doughnuts

Quizplus · Accepted Answer

We can find the market demand by adding up the quantity demanded by each person at the given price of 50 cents per doughnut.
Market demand = Quantity demanded by Al + Quantity demanded by Betty + Quantity demanded by Carol
Market demand = 5 + 0 + 4
Market demand = 9 doughnuts

Fran Runs a Doughnut Shop in a Tiny 3-Person Town