For the set {30, 80, 50, 40, x}, the mean, mode, and median are equal. Find x.

Answer 1

x=50

mode = 50, as there's 2 fifties and only one 30, 40 and 80

median = 05, it's the middle number, 30,40,50,50,80 in order, 3rd is the middle number

mean = (30+80+50+40+50)/5 = 250/5 = 50 = arithmetic average, sum divided by n=5