The average age of students in section A of 50 students is 14 years and the average age of students in section B of 30 students is 6 years. Find the average age of student in both section taken together.
Answer & explanation
Correct answer: option 4
Average age in section A of 50 students =14years
Total age of 50 students =50×14=700
Average age in section B of 30 students = 6years
Total age of 30 students =30×6=180
Average age of both sections = \(\frac{700 + 180}{80}\) = 11 years