Question

At the karate school, Class A has 8 students with an average age of 6 years. Class B has 12 students with an average age of 9 years. The classes combine for a group workout.

What is the average age of the combined classes?

Answer 1

average = the sum of the entries / the number of entries

average = 6(8) + 9(12) / 8 + 12

average = 48 +  108 / 20

average = 156 / 20

average = 7.8 years!

Hope that helps!

Answer 2

Answer: 7.8

Step-by-step explanation: i just took the test :) hope this helps !!