Suppose that Russ has budgeted $20 a month to buy candy bars, music downloads, or some combination of both. If Russ spends all his budget on candy bars he can obtain 40 bars a month; if he buys only downloads, he can buy 20 a month.

a. What is the price of a candy bar?
b. What is the price of a music download?
c. What is the opportunity cost of a music download?
d. What is the opportunity cost of a candy bar?
e. Would the opportunity cost of each good change if Russ decided to increase his monthly budget to $30 for the two items?

a) 50 cents b) $1 c) 2 candy bars d) 0.5 music downloads e) No

Explanation:

a) The price of a candy bar

This is gotten by dividing the $20 budget by the 40 bars which  he can obtain a month

= $20/40 = $.50 = 50cents

b) The price of a music download

This is gotten by  by dividing the $20 budget by the 20 downloads he is able to buy in a  month.

= $20/20=  $1

c) The opportunity cost of a music download is the number of candy bars which is  given up to get it.

The purchase of 1 more music download  is  $1 per download and  requires the sacrifice of  = $1/$.50 =  2 candy bars

d) The opportunity cost of candy bar is the number of  music download which  is given up to get it  is given as  = $.50/$1 = 0.5 = ½ music downloads

e)No, the opportunity cost would not change This is  because the prices of the two goods remains the same and have not changed. it would only change if  Russ either buys more candy bars and/or music downloads than before. for now, the  opportunity cost of music downloads remains 2 candy bars and  the opportunity cost of candy bars remains ½ (0 .5) music downloads.

there's 11 people for the 1st position. then, no matter who gets it, there's only 10 left for the second, and then 9 left for the third. 11 x 10 x 9 = 990.   the answer is there are 990 different ways the positions can be filled by these applicants