Question

the averages age of 32 student is loyears. if the teacher age is also included. the average age increases by one year. what is the age of teacher​

Answer 1

Answer:

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Answer 2

Answer:

The average age of 30 students is 9 years. If the teacher included the average becomes 10 years. What is the age of the teacher?

Soln. :

Average age of 30 students=9

Total age of 30 students = 30 ×9=270 (1)

Average including teacher (31 person, 30 students + 1 teacher) =10

Total age including teacher=31×10=310

Age of 30 students + age of teacher =310

By(1) Replace Age of 30 students with 270

270 + Age of teacher = 310

Age of teacher =310–270=40. Ans…