Correct Answer - Option 4 : 26
Given:
The average age of class = 12 years
Two students who leave the class their ages are 23 years and 25 years respectively.
Concept Used:
Total age of class after both students leaves = Total age of class - Total age of two students who leave the class
Calculation:
Total number of students in the class = x
Total age of class = 12x years
Total age of two students who leave the class = 23 + 25 = 48 years
Total age of class after both students leaves
⇒ 12x - 48 = 11(x - 2)
⇒ 12x - 48 = 11x - 22
⇒ x = 48 - 22
⇒ x = 26
∴ Total number of students in the class is 26.