Fred and Barney Fill Egg Cartons with Eggs

Fred and Barney fill egg cartons with eggs.Fred just started the job and can only fill 25 cartons per hour.Barney has significant on-the-job experience that allows him to fill 50 cartons per hour.Both Fred and Barney work 50 hours per week.Fred's average weekly productivity is _________ cartons;Barney's average weekly productivity is ________ cartons;and,as a team,their average weekly productivity is _________ cartons.

A) 25;50;75
B) 25;50;37.5
C) 25;50;7500
D) 1,250;2,500;1,875
E) 1,250;2,500;3,750