Aptitude - Percentage - Discussion
Discussion Forum : Percentage - General Questions (Q.No. 2)
2.
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:
Answer: Option
Explanation:
Let their marks be (x + 9) and x.
| Then, x + 9 = | 56 | (x + 9 + x) |
| 100 |
25(x + 9) = 14(2x + 9)
3x = 99
x = 33
So, their marks are 42 and 33.
Discussion:
170 comments Page 6 of 17.
Ravi said:
10 years ago
Option method is too easy and fastest way to solve this question.
Mazher said:
10 years ago
@Tukuna Behera.
Why did we take the 25 to the R.H.S, that's the only step I did not understand, help please, or any one, why did we take the 25 to the Right Hand Side?
Why did we take the 25 to the R.H.S, that's the only step I did not understand, help please, or any one, why did we take the 25 to the Right Hand Side?
SandipWaghmare said:
10 years ago
@Sawant.
= 30/100*x = 180*100/30.
x = (180*100/30)100/30.
x = 270.
= 30/100*x = 180*100/30.
x = (180*100/30)100/30.
x = 270.
Babajan said:
9 years ago
Which formula of percentage are used in this question?
Arshad said:
9 years ago
Try by Back Solving Method:
Lets try c: 42, 33 so it means total marks are : 42 + 33 = 75 Marks.
Let's try to find out 56 % from marks given in option C.
42 * 100/75 = 56 %
33 * 100/75 = 44 %.
So option C is the correct answer .
Lets try c: 42, 33 so it means total marks are : 42 + 33 = 75 Marks.
Let's try to find out 56 % from marks given in option C.
42 * 100/75 = 56 %
33 * 100/75 = 44 %.
So option C is the correct answer .
Uto hussain said:
9 years ago
Let's say 'x' is the mark of the first person.
Then from the question, the mark of a 2nd person is 'x + 9'.
Since the percentage of the 2nd person is given i.e. 56%.
We can solve the x value using the below formula.
Per% of 2nd person = mark of 2nd person * 100/ (total marks i.e x + x + 9).
56 = ((x + 9) *100) / (x + x + 9).
Then from the question, the mark of a 2nd person is 'x + 9'.
Since the percentage of the 2nd person is given i.e. 56%.
We can solve the x value using the below formula.
Per% of 2nd person = mark of 2nd person * 100/ (total marks i.e x + x + 9).
56 = ((x + 9) *100) / (x + x + 9).
Prudhvira said:
9 years ago
Please, explain in a simple way.
Shubham thakur said:
9 years ago
It's very simple.
If 1student got 56% that means other got 44%.
56 - 44 = 12%.
Fr 12%~9 is there,
So, for 100% ~99.
Only pair which satisfies it is 39 & 30.
That it.
If 1student got 56% that means other got 44%.
56 - 44 = 12%.
Fr 12%~9 is there,
So, for 100% ~99.
Only pair which satisfies it is 39 & 30.
That it.
Anirudh razdan said:
9 years ago
Why do we equate it to x + 9? Why not x?
Bgnr said:
9 years ago
I am confused it says the sum of their marks. Then it should be like this.
x + x + 9 = 56/100.
Can anyone explain this?
x + x + 9 = 56/100.
Can anyone explain this?
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