In a class, the average age of 35 boys is 15 years and the average of 25 girls is 10 years. what is the average age of the whole class? Choose the correct choice from the following.
A) 12 Years	B) 12.3 Years	C) 12.9 Years	D) 13 Years	E) 15 Years
Total age of 60 students   (35X 15+25 X 10) = 775   Average = 775/60 = 12.9 Years   12.9 Years
<result>C</result>
In a class, the average age of 35 boys is 15 years and the average of 25 girls is 10 years. what is the average age of the whole class?