In a class, the average age of 30 boys is 13 years and the average of 20 girls is 12 years. what is the average age of the whole class?
Choose one:
A) 10.6
B) 11.6
C) 12.6
D) 13.6
E) 14.6
Explanation:   Total age of 50 students   (30X 13+20 X 12) = 630   Average = 630/50= 
<gadget id="calculator">630/50</gadget>
<output>63/5 = around 12.6</output>
12.6 Years   Answer 12.6
<result>C</result>
In a class, the average age of 30 boys is 13 years and the average of 20 girls is 12 years. what is the average age of the whole class?