# Arithmetic Aptitude :: Average

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## 8. The average age of five girls 11.The oldest among them is 15 years old.What is the average of the others?

**Answer:**

**Option C**

**Explanation :**

Let 'T' be the total age of 5 girls.

Then, T/5 = 11.

=> T = 55.

Given, Age of the Oldest girl = 15.

Then, Total age of other 4 girls will be 55-15=40.

So, Avg. of other 4 girls 40/4 = 10.

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