Four extra-large sandwiches of exactly the same size were ordered for m
students, where m > 4. Three of the sandwiches were evenly divided among
the students. Since 4 students did not want any of the fourth sandwich, it
was evenly divided among the remaining students. If Carol ate one piece
from each of the four sandwiches, the amount of sandwich that she ate would
be what fraction of a whole extra-large sandwich?
A. (m+4)/m/(m-4)
B.(2m-4)/m/(m-4)
C.(4m-4)/m/(m-4)
D.(4m-8)/m/(m-4)
E.(4m-12)/m/(m-4)
答案:E
想不通怎么得到答案的? |