Question

At a certain school the ratio of teachers to students is 1 to 10. Which of the following could be the total number of teachers and students ?
a.100
b.121
c.222
d.1,011

I need a good but simple explaination :)

Answer 1

the question is incomplete.but the no of students will be 10 times of the teachers

Answer 2

wait i think it could be 121

Answer 3

put x = number of teachers. then number of students is 10x and therefore the total is 11x

Answer 4

1:10
Multiply both sides by 11
11:110
11+110 = 121

Answer 5

so we need the total to be divisible by 11 yes? no fractional people

Answer 6

sure it could of course be any number. it does not have to be 121

Answer 7

it could be 33, (3 teachers, ten students) or 1100 but whatever it is it must be divisible by 11

Answer 8

But why 11 ?

Answer 9

data insufficent!:)

Answer 10

why does it have to be divisible by eleven? because for every one teacher you have ten students. that makes eleven.

Answer 11

see ratio means that both numbers have been divided by same factor to change them to lowest form so if they r multiplied by the same no then we get the original numbers

Answer 12

1 teacher 10 students 11 total
2 teachers 20 students 22 total
3 teachers 30 students 33 total
etc

Answer 13

@ mr knowledgeable, question asks
Which of the following COULD be the total number of teachers and students ?

Answer 14

as per given ratio, for every teacher there are 10 students means their total works out to 11

So if no of students is X
then no of teachers is 10x

so x+10x = 11x

Which means the total number has to be divisible by 11
ouit of the given choices only 121 is divisible by 11 !!!!!

Answer 15

Oooooo okay then I get it thanks :D So grateful for your help :]

Answer 16

what harkirat said.

Answer 17

Hewy ccardenas, Hope the explanation was clear !!!

Pls click the GOOD ANSWER button if u r satisfied :)

Answer 18

harkirat seems to be right.Applause!

Answer 19

I did an for satellite73 also :D