Question
Average age of a class of 20 students is 16
years. Average age of the class is increased by 24 months if the age of the teacher is included. Find the age of the teacher.Solution
Sum of the ages of all the students in the class = 20 × 16 = 320 years
Sum of the ages of the students along with teacher = 21 × 18 = 378 years
So the age of the teacher = 378 – 320 = 58 years
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