Question

The average age of four girls is 12 years. The ages of three of them are 8, 12, and 13. What is the age of the fourth girl?

• A. 13 years
• B. 14 years
• C. 15 years
• D. 16 years

Answer 1

Answer: (C)

15 years

Answer 2

Number Of girls =4
Age of three of them are 8, 12 and 13
Let the age of last girl be $X$
Therefore
$33+X=48$
therefore
$X=15 \text{ Years}$
the age of last girl is 15 years
The correct answer is (C): 15 years