Two students appeared at an examination. One of them secured 9 marks more than the other and his marks was 56% of the sum of their marks. The marks obtained by them are:
Suppose 1 students score is 'x',then others will be 'x+9'
Now the next information is given about the student whose score is 'x+9'
Whenever in the question 'and'/'is' given put '=' sign
56% means 56/100 ,of means put multiplication sign
and sum of the marks means(x+x+9)
Now just solve the equation.
Vel said:
(Thu, Feb 17, 2011 01:15:22 PM)
Ok why equal sign assigned b/w x+9 and 56/100 (x+9+x) ?
Hiren Savalia said:
(Sat, May 7, 2011 01:13:02 PM)
Go by option u will get answer easily ...
Let me choose 42 & 33
As all answers have difference of 9 so next step is to check 56 % condition for this answer ....
Now 56 % of sum of marks means 75 is 100 % then 42 is how much ?
calculate & u will get 56 % so u will come to know that the answer that u have chosen is d ri8 1 ... enjy :)
Person said:
(Sat, Jul 2, 2011 01:33:27 PM)
Good. @hiren.
Divyanshu said:
(Wed, Jul 6, 2011 02:52:31 PM)
Hw we can calcuate, total marks ?
Prasad said:
(Mon, Sep 5, 2011 02:11:42 PM)
@aparna..Hi..could it possible to put in details.please
Uttam said:
(Sun, Sep 18, 2011 07:41:11 AM)
First find total marks
difference between percentage=56%-44%=9%
In the question given difference between marks as 12
so, if mark is percentage
9 12%
? 100%
so by cross multiplying total marks=(9*100)/12=75.
now student 1s marks=56% of 75 i.e
(56/100)*75=42.
student 2s marks=44% of 75 i.e
(44/100)*75=33.
Krishna said:
(Tue, Nov 1, 2011 11:39:34 AM)
@uttam
How it can be 56%-44%=9%?
Can you explain it?
Radhika said:
(Sat, Nov 5, 2011 08:08:46 PM)
56-44/100=9
12/100=9
=75
now
56/100*75=42
44/100*75=33
:)
25(x + 9) = 14(2x + 9)