题目

24号考试~SAT OG数学P981第16题!
TO celebrate a colleague gratuation,the m cowworkers in an office agreed to contribute equally to a caterred lunch that costs a total of y dollars .if p of the cowwokers fail to contribute ,which of the following represents the additional amount ,in dollars ,that each of the remaining cowworkers must contribute to pay for the lunch?
A ym
B y(m-p)
C py(m-p)
D y(m-p)m
E pym(m-p)

提问时间：2020-11-03

答案

选E,原来每个人要付y/m元,后来每人要付y/(m-p)元,后面的减去前面的,通分,变成答案E