Aptitude - Ratio and Proportion - Discussion
Discussion Forum : Ratio and Proportion - General Questions (Q.No. 4)
4.
Seats for Mathematics, Physics and Biology in a school are in the ratio 5 : 7 : 8. There is a proposal to increase these seats by 40%, 50% and 75% respectively. What will be the ratio of increased seats?
Answer: Option
Explanation:
Originally, let the number of seats for Mathematics, Physics and Biology be 5x, 7x and 8x respectively.
Number of increased seats are (140% of 5x), (150% of 7x) and (175% of 8x).
 |
 |
140 | x 5x |  |
, | |
150 | x 7x | |
and | |
175 | x 8x | |
| 100 | 100 | 100 |
| 7x, |
21x | and 14x. |
| 2 |
 The required ratio = 7x : |
21x | : 14x |
| 2 |
14x : 21x : 28x
2 : 3 : 4.
Discussion:
89 comments Page 7 of 9.
Vivek mishra said:
1 decade ago
Thanks to giving a good salution with shortcut.
Priya said:
8 years ago
Very good explanation, Thanks @Harjinder Singh.
Mk.raj said:
1 decade ago
Because% mean 100, than 40% increase means 140.
J K Reddy said:
10 years ago
I have small doubt any sum I can do this modal?
Mariah said:
1 decade ago
Can we apply this shortcut for other problems?
Priyabrata said:
1 decade ago
Thanks Harjinder, Very easy method apply you.
Sunita said:
1 decade ago
Very good and easy method singh. Keep it up.
Bharadwaj said:
1 decade ago
Ramesh and Harjinder was explained well :).
Shivangi said:
3 years ago
How it became 40% to 140%, 50% to 150%?
(47)
Ajit raj said:
9 years ago
Mindblowing explanation, Thank you all.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers