The average age of 19 students of a class is 22 years. If a new student of age 42 years joins the class, then what will be the average age of these 20 students?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 23 years.
Average = Total Age / Number of Students
Total Age of 19 students = Average Age × Number of Students = 22 × 19 = 418 years
Total Age of 20 students = 418 + 42 = 460 years
The new average age of the 20 students,
New Average =