# HI CEans here a simple question for you people.....

Question asked by bharathkumarp in #Coffee Room on May 3, 2010

bharathkumarp 路 May 3, 2010

Rank D3 - MASTER

The average mark obtained by 120 candidates was 35.If the average mark of passed candidates was 39 and that of the failed candidates was 15,

how many candidates passed the examination?😕😕😕 Posted in: #Coffee Room

how many candidates passed the examination?😕😕😕 Posted in: #Coffee Room

Saandeep Sreerambatla 路 May 5, 2010

Rank A2 - PRO

By the given conditions we can have 2 equations.

x + y = 120

39x + 15y = 120 * 35

On solving these equations we get x = 100 and y = 20

So candidates passed = 100

failed = 20

x + y = 120

39x + 15y = 120 * 35

On solving these equations we get x = 100 and y = 20

So candidates passed = 100

failed = 20

bharathkumarp 路 May 5, 2010

Rank D3 - MASTER

hi Mr.English scared your brilliant, by taking the equation and solving....But it consume more time.. There is another way to answer, just think. with out paper work you can easily solve this........

Kaustubh Katdare 路 May 5, 2010

Rank A1 - PRO

The total number of candidates will be divided in ratio 5:1 [pass:fail], which makes it 100:20, that means 100 passed and 20 failed.

sherya mathur 路 May 5, 2010

Rank C3 - EXPERT

given total number of passed students are =120

let the number of pass students=x

and let the number of fail students is=y

so from the questions

the equations will be

x+y=120 .............(1)

total number of marks get by all the students=120*35

=4200

now the second equation will be

39x + 15y= 4200.........(2)

putting the value of x in equation (2) from the first equation ie. x=120-y

39(120-y)+15y=4200

4680-39y+15y=4200

24y=480

y=20

by solving it we will get

y=20

x=100

so the number of passed students =100

sp the number of failed students =20

Never let your sense of morals get in the way of doing what's right

let the number of pass students=x

and let the number of fail students is=y

so from the questions

the equations will be

x+y=120 .............(1)

total number of marks get by all the students=120*35

=4200

now the second equation will be

39x + 15y= 4200.........(2)

putting the value of x in equation (2) from the first equation ie. x=120-y

39(120-y)+15y=4200

4680-39y+15y=4200

24y=480

y=20

by solving it we will get

y=20

x=100

so the number of passed students =100

sp the number of failed students =20

Never let your sense of morals get in the way of doing what's right