Question 823402
<pre>
The average of ten is 15.

AVERAGE = {{{SUM_OF_NUMBERS/NUMBER_OF_NUMBERS)}}}

    15 = {{{SUM/10}}}

Multiply both sides by 10

    150 = SUM</pre>
If one number is removed, the average becomes 14. What number is removed?<pre>
Let the number removed be x

Then the sum of the remaining 9 numbers = 150-x

AVERAGE = {{{SUM_OF_NUMBERS/NUMBER_OF_NUMBERS)}}}

     14 = {{{(150-x)/9}}}

Multiply both sides by 9

    126 = 150-x

      x = 24

The number removed was 24

Edwin</pre>