Suppose Tamara's favorite arcade game,PAC-MAN,costs $1 to play and her second-favorite arcade game,Street Fighter,costs 50 cents to play.If she receives 10 utils when she plays Street Fighter,what is the least number of utils she must receive from PAC-MAN to play PAC-MAN over Street Fighter?
A) 15
B) 10
C) 25
D) 5
E) 20

Question

Quizplus · Accepted Answer

For Tamara to prefer playing PAC-MAN over Street Fighter, the utility per dollar spent must be greater for PAC-MAN. Since Street Fighter gives 10 utils for 50 cents, that's 20 utils per dollar. Therefore, for a $1 game of PAC-MAN to be preferable, it must offer more than 20 utils, making the least number of utils she must receive from PAC-MAN 21 or more, which is closest to option E, 20, given the options provided.

Suppose Tamara's Favorite Arcade Game,PAC-MAN,costs $1 to Play and Her