2 Views

Question : The average age of 9 girls is 16 years. The average age of 11 boys is 26 years. What is the average age of all these boys and girls taken together?

Option 1: 22 years

Option 2: 23 years

Option 3: 22.5 years

Option 4: 21.5 years


Team Careers360 25th Jan, 2024
Answer (1)
Team Careers360 26th Jan, 2024

Correct Answer: 21.5 years


Solution : Given,
The average age of 9 girls is 16 years. The average age of 11 boys is 26 years.
We know,
Average = $\frac{\text{Sum of all observations}}{\text{Total no of observations}}$
The average age of all together $=\frac{9×16+11×26}{9+11}=\frac{430}{20}= 21.5$
Hence, the correct answer is 21.5 years.

Know More About

Related Questions

TOEFL ® Registrations 2024
Apply
Accepted by more than 11,000 universities in over 150 countries worldwide
Manipal Online M.Com Admissions
Apply
Apply for Online M.Com from Manipal University
View All Application Forms

Download the Careers360 App on your Android phone

Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile

150M+ Students
30,000+ Colleges
500+ Exams
1500+ E-books