Econ Opportunity Cost

1. $360 (Tutoring a classmate and gain + To pay a rent of Playing basketball )

2. $150(Doing housework for sombody and gain)

1. the opportunity of palying basketball is $160.. 因為他有3個選擇, 他選擇了第一選擇, 而放棄最高的價值是第二選擇的$160(highest-valued option forgone)
2. the opprotunity cost of tutoring a classmate is $200.. 因為他有3個選擇, 他選擇了第二選擇, 而放棄最高的價值是第一選擇的$200(highest-valued option forgone)

2009-01-03 16:31:44 補充：
最好答埋opportunity cost is the highest-valued option forgone, 因為可能會有一分

Q1) The opportunity cost of playing basketball is the value of tutoring a classmate which is $160

Q2) The opportunity cost of tutoring a classmate is the value of playing basketball which is $200

Actually,
opportunity cost
=highest-valued option forgone
=the option that has the highest value among all the options that you have to forgo (i.e. the option which costs the most $$ other than your own choice)

1. $160
2. $150

Opportunity Cost is the value of the
next best alternative foregone as the
result of making a decision.

2009-01-03 11:38:44 補充：
Please note that he has to PAY the rent of $200 if he selected to play basketball. He is not going to GAIN this $200 ^_^ ...