Question

the average age of a class of 35 students is 14 years if the teacher's age is included ,the average age increases by one year find the age of teacher​

Answer 1

29 is the best answer

Answer 2

w.k.t.,

mean=sum of all observation÷no. of observation

let x be the sum of ages of the class.

x/35=14

x=490

let the age of teacher be y .

y+490/36=15 (given)

y+490=36×15

y= 540-490

y=50