Aptitude - Ratio and Proportion - Discussion
Discussion Forum : Ratio and Proportion - General Questions (Q.No. 2)
2.
Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is:
Answer: Option
Explanation:
Let the third number be x.
| Then, first number = 120% of x = | 120x | = | 6x |
| 100 | 5 |
| Second number = 150% of x = | 150x | = | 3x |
| 100 | 2 |
 Ratio of first two numbers = |
 |
6x | : | 3x |  |
= 12x : 15x = 4 : 5. |
| 5 | 2 |
Discussion:
134 comments Page 13 of 14.
Kunal said:
1 decade ago
Why take third number as 100?
Naveen said:
1 decade ago
Take 10 and 20% more than 10 is 12 and 50% more than 10 is 15 so the ratio is 12:15 which is nothing but 4:5 .
Haseeb Siddiqi said:
1 decade ago
Ramesh's method is good and easy.
Sruthi said:
1 decade ago
Sathi's concept is right.
Sathi said:
1 decade ago
Take A,B,C as three numbers
A is 20% more than C
A=C+20%of C=C+0.2C=1.2C
same way
B=C+50%of(C)=C+0.5C=1.5C
ratio A/B=1.2C/1.5C=4/5
Ans 4/5
A is 20% more than C
A=C+20%of C=C+0.2C=1.2C
same way
B=C+50%of(C)=C+0.5C=1.5C
ratio A/B=1.2C/1.5C=4/5
Ans 4/5
Sumit said:
1 decade ago
Let it be of 100. It is most convennience.
SUGANYA.P said:
1 decade ago
I do know understand this concepts please explain.
Sathya said:
1 decade ago
Let 3rd no is x
20%of x=(20/100)*x
50%of x=(50/100)*x
1/5x:1/2x
ans=2:5
20%of x=(20/100)*x
50%of x=(50/100)*x
1/5x:1/2x
ans=2:5
Sridhar said:
1 decade ago
Why should take the value of third no is 100 only? why not 60, 70, 80.
Ramesh said:
1 decade ago
Dear xyz, it is not 20% and 50%, but it is 20% and 50% MORE THAN third number.
If third no is 100, it is 120 and 150
So, 120 : 150
12: 15 or
4:5
If third no is 100, it is 120 and 150
So, 120 : 150
12: 15 or
4:5
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