The average age of students in section A of 115 students is 15 years and the average age of students in section B of 120 students is 22 years. Find the average age of students in both sections taken together?  Select.
A) 26 years B) 30years C) 18years D) 25years E) 20years
The required average = (115*15+120*22)/115+120 = 18 years   Answer is 18years
<result>C</result>
The average age of students in section A of 115 students is 15 years and the average age of students in section B of 120 students is 22 years. Find the average age of students in both sections taken together?