Aptitude - Ratio and Proportion - Discussion
Discussion Forum : Ratio and Proportion - General Questions (Q.No. 15)
15.
In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?
Answer: Option
Explanation:
Let the number of 25 p, 10 p and 5 p coins be x, 2x, 3x respectively.
| Then, sum of their values = Rs. |  |
25x | + | 10 x 2x | + | 5 x 3x |  |
= Rs. | 60x |
| 100 | 100 | 100 | 100 |
 |
60x | = 30 |  x = |
30 x 100 | = 50. |
| 100 | 60 |
Hence, the number of 5 p coins = (3 x 50) = 150.
Discussion:
117 comments Page 8 of 12.
Sahana said:
5 years ago
Why they are equated to 30?
In problem, it is given that 30 rs in all, hence it would be equated to 90, right?
In problem, it is given that 30 rs in all, hence it would be equated to 90, right?
Ronie said:
7 years ago
The easiest way is to convert 30 to paisa i.e 3000p.
Now no of 5p coin is( 3/1+2+3)*3000,
=3/6*3000=150.
Now no of 5p coin is( 3/1+2+3)*3000,
=3/6*3000=150.
Tomoriba Shira said:
5 years ago
Given ratios 1 : 2 : 3.
Therefore 3/6 * 300p = 150,
Here 6 we get by adding all ratios i.e( 1 + 2 + 3).
Therefore 3/6 * 300p = 150,
Here 6 we get by adding all ratios i.e( 1 + 2 + 3).
Kartik pandey said:
3 years ago
5 paisa coin ratio value is 3.
So the answer must be multiple of 3 first try to check its multiple.
So the answer must be multiple of 3 first try to check its multiple.
(42)
AKSHAY said:
1 decade ago
SRJ: you have done some thing wrong as in oyur solution 'x=150'
but that is the no. of 25p coins!!!
but that is the no. of 25p coins!!!
Shashikant said:
1 decade ago
@Kkp.
x is the multiplying factor which when multiplied by 60 and divided by 100 gives you Rs 30.
x is the multiplying factor which when multiplied by 60 and divided by 100 gives you Rs 30.
Rahul said:
5 years ago
@Yhtsawakeviv.
Can you explain why 3 is multiplied here?
i.e No of 5p coins = 3x = 3*50 = 150.
Can you explain why 3 is multiplied here?
i.e No of 5p coins = 3x = 3*50 = 150.
Captain Veyom said:
9 years ago
Let apply proportion 1 : 2 : 3.
25p : 10p : 5p,
Rs 30 = 300 p,
3/6 * 300 = 50 * 3 = 150.
25p : 10p : 5p,
Rs 30 = 300 p,
3/6 * 300 = 50 * 3 = 150.
Nagamani said:
8 years ago
Even I am not getting clarity. Can any one give the correct explanation for this, please?
Kkp said:
1 decade ago
Please can anybody tell that in the main solution why total money is written as 60x/100?
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