Question

The average age of 40 students of a class is 18 years. When 20 new students are admitted to the same class, the average age of the students of the class is increased by 6 months. The average age of newly admitted students is

• A. 19 years 6 months
• B. 19 years
• C. 20 years 6 months
• D. 20 years

Answer 1

Answer:

A. 19 years 6 months

Total age of 20 new students = (60 × 18.5 – 40 × 18) years = (1110 – 720) years = 390 years Their average age = 390/20 = 19.5 years