Question

average age of 30 students is 13 yrs.When the age of the teacher is added to them,average becomes 14 . What is the age of the teacher​

Answer 1

Answer:

Age of teacher is 44 years

Step-by-step explanation:

Let the age of teacher is x year

Average Age of students including the teacher = (Sum of age of all students+ Age of teacher) ÷ (total number of students+ total number of teachers)

14 =(13×30+x ×1)÷(30+1)

14 = (390 + x) ÷ 31

14 × 31 = 390 + x

435 = 390 + x

x = 434 - 390 = 44 years