SOLUTION: Look at the number series below. 16, ( ? ), 13, 15, 6, 24 If the average of the series is 15, then what is the missing number?

Algebra ->  Sequences-and-series -> SOLUTION: Look at the number series below. 16, ( ? ), 13, 15, 6, 24 If the average of the series is 15, then what is the missing number?       Log On


   

Question 831867: Look at the number series below.
16, ( ? ), 13, 15, 6, 24
If the average of the series is 15, then what is the missing number?

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
The average is the sum of values divided by the number of values.
A=%2816%2BX%2B13%2B15%2B6%2B24%29%2F6=15
16%2BX%2B13%2B15%2B6%2B24=90
Now solve for X.