Answer:
Consider a Caribbean cruise route served by two cruise​ lines, Carnival and Royal Caribbean. Both lines must choose whether to charge a high price ​($320​) or a low price ​($300​) to vacationers. These price strategies with corresponding profits are illustrated in the payoff matrix to the right. ​ Carnival's profits are in red and Royal​ Caribbean's are in blue. Suppose the cruise lines decide to collude. At which outcome are joint profits​ maximized?
Joint profits are maximized when Carnival picks $320 and Royal Caribbean picks $320.
Explanation:
When Carnival picks $320 and Royal Caribbean picks $320, then joint profits are maximized.
Nash equilibrium would exist only when Royal chooses $300 and the carnival chooses $300.
However, if both Carnival and Royal Caribbean charge a lower price, both of them can earn a higher profit.