197. The average age of 20 number students
in a class is 11 years. If the age of
teacher is added, the average age is
increased by 1 year. What is the age of
the teacher ?
Answers
Answered by
0
Answer:
Teacher's age-20
Step-by-step explanation:
20 is the age of teacher
Answered by
1
Answer:
age of teacher = 32 years
Step-by-step explanation:
average age of 20 number students in a class is 11 years.
Total Age = 220 ( students alone)
If the age of teacher is added, the average age is increased by 1 year.
i.e. For 21 people, average age is 12 years.
Total Age = 252 ( including teacher)
Difference between the total age gives the age of teacher = 252 - 220 = 32.
(or)
If the age of teacher is added, the average age is increased by 1 year.
( Initial no. of students * increase in average )+ new average = age of new person
20 * 1 + 12 = 32
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