Answer
The 5th number is 99
Work Step by Step
The mean is 91 and the values are:9 9, 86, 76 and 95.You have to find the fifth value.
Using the mean formula, you find x:
$\frac{99+ 86+ 76+ 95+ x}{5}$=91 -Multiply both sides by 5 to isolate x-
99+86+76+95+x=455 -simplify-
356+x=455 -subtract 356 from both sides to solve for x-
x=99
Check your work:
$\frac{99+ 86+ 76+ 95+ 99}{5}$=$\frac{455}{5}$=99.
So the missing value is 99.
