The average age of 14 students of a class is 17 years. If a new student of age 32 years joins the class, then what will be the average age of these 15 students?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 18 years .
The average age of the 14 students is 17 years. So, the total age of these 14 students is = 14 × 17 = 238 years
The new student is 32 years old. So, the new total age of all 15 students is = 238 + 32 = 270 years
The new average age is the total age divided by the number of students = 270 / 15 = 18 years