Question 184003
up to and including george bush, teh ages of teh last 15 presidents when they first took office were 56 55 51 54 51 60 62 43 55 56 52 69 64 45 54
if the mean age of the past 16 presidents is 54.94, at what age did the missing president take office?
; 
Let x = age of the missing one:
:
Add up the given ages, and write the equation:
{{{(x + 827)/16}}} = 54.94
Multiply eq by 16:
x + 827 = 16(54.94)
:
x + 827 = 879
:
x = 879 - 827
:
x = 52 is age of the missing pres