Question 497453
The average of a set of numbers is 120. 
Only one number is different from the other three. 
What could be that number?
let y = "that number"
let x = the 3 same numbers
:
{{{(3x + y)/4}}} = 120
3x + y = 4(120)
3x + y = 480
y = -3x + 480
:
Choose a value for x, find y, 
let x = 130,
y = 3(130)+480
y = 390 + 480
y = 90 could be the number