Medical school, and internship and residency program
500 HUNDRED IS THE AWNSER HOPE IT HELPS PLZ THANKS ME
Answer:
A. the double coincidence of wants problem.
Explanation:
Trade by barter involves the exchange of goods and services for goods and services without the use of money as a medium of exchange. In barter system, there is what we call double coincidence of wants. This is the economic situation whereby both parties holds what the other wants to buy, so they exchange the goods directly. Here, both parties agrees to buy and sell each other commodities. However, if one of the party is not interested in what the other party is offering, it causes a disruption in the trade. This disruption refers to a drawback in the system like the example described in the question.
Here, Andy couldn't make a deal with Danny even tho he wants what Danny is offering. This is because what Danny isn't interested in what Andy is offering. Thus, the double coincidence of want and barter trade can't occur between the two parties.
Solution :
According to the theory of demand and supply, the equilibrium price and the quantity is established where both the demand and supply curves intersect.
From the graph, we can see that the point of equilibrium is at the intersection of D and S.
At this point, mathematically, D = S. In order to determine the price and quantity which exists at this point, we need to equate the demand as well as supply functions to calculate the equilibrium values.
∵ D is equal to S, we have



Now substituting this value of the equilibrium price in to any of the functions, we get the equilibrium quantity at this price.




This is the equilibrium quantity. At this point, equilibrium price as well as the quantity is the same. Let the price of the golf club increases from $120 to $140. So substituting the value to the function above to determine the new quantity.

= 100
Therefore, when the demanded quantity decreases from 120 thousand clubs to 100 thousand clubs. This increases the price and decreases the quantity as the supply curve moved to the left. The demand remains constant.