Ireally need with this btw adams high school 1200 jefferson high school 1500 madison high school 1000 lincoln high school 1300 grant high school 1000 if adams high and jefferson high both lose 100 students each, madison high's population stays the same, and both lincoln high and grant high gain 200 students each, what happens to the mean of the population of all 5 schools? a) the mean increases by 40. b) the mean decreases by 40. c) the mean remains the same. d) the mean increases by 200