Company's Average Profit Over 5 Years

A company earned a profit of $8.0 million each year for 3 consecutive years.  For each of the next 2 years the company earned a profit of $9.0 million.  For this 5-year period, what was the company's average yearly profit, in millions of dollars?
A.)  8.2
B.)  8.25
C.)  8.4
D.)  8.5
E.)  8.6

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To find the average of a group of terms, add the terms and divide by the number of terms.

8 + 8 + 8 + 9 + 9 
--------------------- = average   {added profits and divided by the number of profits}
            5

42
---- = average   {added in numerator}
 5

= 8.4   {divided}

C.)  8.4

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