https://web2.0calc.com/questions/cphill-pls-help-stats
The ages are
19,19, 20, 20, 21, 21,22,24,25,25,26,27,28,28, 30,30,30,31,32,32,34,34,35,38,39,45,48
Mean = 29 = x
Median = 28 = y
Mode = 30 = z
So
x (y - z) = 29 ( 28 - 30) = 29 (-2) = -58
