Question

out of 30 teachers of a school,a teacher age 60 years retired.In his place another teacher of age 30 years was appointed.As a result ,the mean age of the teachers will

Answer 1

@gorv

Answer 2

first go with normal approch

Answer 3

let the mean =x

Answer 4

for 30 people mean= x
total age = 30*x agree??

Answer 5

@dg2

Answer 6

lol rply i m not goin to solve it .....i will assist u only

Answer 7

well now a teacher of 60 is removed so subtract 60 from x and 30 year old is added
so add 30 in that and divide it by 30 to find mean

Answer 8

gudluck :)

Answer 9

(x-60+30)/30

Answer 10

@ganeshie8

Answer 11

you're excluding a older woman from the list

Answer 12

so the new mean obviously will be lesser than the older mean rihgt ?

Answer 13

yes.

Answer 14

compare it with your overall percentage in exams if you score 100 in a subject versus just 30

Answer 15

30*x=29x+60-30

Answer 16

30/100

Answer 17

x=30 i got

Answer 18

the answer for this question is "decrease"