In a class, the average age of 42 boys is 12 years and the average of 28 girls is 10 years. what is the average age of the whole class?  Answers.
A) 11.2 Years	B) 12.6 Years	C) 13 Years	D) 13.5 Years	E) 14 Years
Total age of 70 students   (42X 12+28 X 10) = 784   11.2 Yearsverage = 784/70= 
<gadget id="calculator">784/70</gadget>
<output>56/5 = around 11.2</output>
11.2 Years   11.2 Years)
<result>A</result>
In a class, the average age of 42 boys is 12 years and the average of 28 girls is 10 years. what is the average age of the whole class?