The average age of a class of 29 students is 11 years. If the age of teacher is included, then the average increases by 1 year. Find the age of the teacher.
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Answer:
41 years
Step-by-step explanation:
Average=Sum of observations/no. of observations
11=Sum of age of students(s)/29
s=11*29
s=319
When teacher is included:
11+1=Sum of ages of teacher and students(S)/(29+1)
12=S/30
S=12*30
S=360
Sum of ages of students=319
Sum of ages of teacher and students=360
Therefore, age of teacher=S-s
=360-319
Age of teacher=41
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