Correct option is D
Given:
The average age of 59 students = 22 years
The average age of the whole group (59 students + 1 teacher) = 23 years
Formula Used:
Total age of the group = Average age of the group × Number of people in the group
Solution:
Total age of 59 students: = 22 × 59 = 1298 years
Total age of 60 people (59 students + teacher) = 23 × 60 = 1380 years
Teacher’s age = 1380 – 1298 = 82 years
Thus, the age of the teacher is 82 years.
Alternate Solution:
If the teacher age is included the increase in the age = 23 - 22 = 1 year
total increase = = 60 year
So, the teacher age = 22 + 60 = 82 year
English
80 Questions
160 Marks
60 Mins
