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:
121 comments Page 12 of 13.
Akshayjr. said:
7 years ago
1x+2x+3x = 30.
6x = 30,
x=5.
Let;
1) 25 paise =Rs 1x5 =5 and No. Of coins = 5 * 4=20coins.
2) 10 paise =Rs 2x = 2 * 5 =Rs10 and no.of coins equal to 10 * 10 = 100 coins,
3) 5 paise= Rs 3x= 3x5=Rs15 and of coins =20 * 15= 300 coins.
6x = 30,
x=5.
Let;
1) 25 paise =Rs 1x5 =5 and No. Of coins = 5 * 4=20coins.
2) 10 paise =Rs 2x = 2 * 5 =Rs10 and no.of coins equal to 10 * 10 = 100 coins,
3) 5 paise= Rs 3x= 3x5=Rs15 and of coins =20 * 15= 300 coins.
Manu said:
7 years ago
@All.
According to me, the solution is;
Rs.30 = 3000p (30X100=3000).
1:2:3 = 3000.
so to find out the number of 5 p coins:
3000X (3/6) = 500X3 = 1500.
Ans: 1500
Please tell me, where I am going wrong?
According to me, the solution is;
Rs.30 = 3000p (30X100=3000).
1:2:3 = 3000.
so to find out the number of 5 p coins:
3000X (3/6) = 500X3 = 1500.
Ans: 1500
Please tell me, where I am going wrong?
Swapnil said:
7 years ago
Agree @Manu.
Please, someone, clarify it clearly.
Please, someone, clarify it clearly.
Sahana said:
6 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?
Samiran biswas said:
6 years ago
1/4:2/10:3/20
5:4:3
Then ,
The Questions asked that, find the value in coins of 5 paise
(3/12)*30.
=15/2 in ripped.
And in coins 15/2*20= 150 is the answer.
5:4:3
Then ,
The Questions asked that, find the value in coins of 5 paise
(3/12)*30.
=15/2 in ripped.
And in coins 15/2*20= 150 is the answer.
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.
Shyam Sundar said:
5 years ago
1/4*x + 1/5*x+3/20*x =30.
12x=30*20,
12x=600,
X=600/12=50,
No of 5p = 3(50) = 150.
12x=30*20,
12x=600,
X=600/12=50,
No of 5p = 3(50) = 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).
Archit said:
5 years ago
@Tomoriba
How did you got 3/6*300 p =150,
It should be 3/6*3000p =150,
Here you multiplied 30 * 10 p which is wrong.
Shouldn't we multiply 30*1000?
How did you got 3/6*300 p =150,
It should be 3/6*3000p =150,
Here you multiplied 30 * 10 p which is wrong.
Shouldn't we multiply 30*1000?
Iswariya said:
3 weeks ago
Ratio of paise: 25p = 1x, 10p = 2x, 5p = 3x
Rs.30 =3000p.
25 * 1x + 10 * 2x + 5 * 3x = 3000,
60x = 3000.
x=50, then 3x= 150.
Rs.30 =3000p.
25 * 1x + 10 * 2x + 5 * 3x = 3000,
60x = 3000.
x=50, then 3x= 150.
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