The average age of a group of 40 students is 37 yrs. If a teacher is included then the average age rises by 1, then find the age of the teacher after 2 years?
Solution
Correct Answer: Option B
X = 37*40 = 1480
X = 38*41 = 1558
T age = 1558 – 1480 = 78
Aftr 2 yrs = 78+2 = 80
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