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 11 of 12.
Akash sahoo said:
7 years ago
25p 10p 5p
1 : 2 : 3
If 25p*1=25p
10p*2=20p
5p*3=15p.
60p --> 30
1 --> 30/0.60p=50 piece,
So, 3---------50*3 = 150pieces.
1 : 2 : 3
If 25p*1=25p
10p*2=20p
5p*3=15p.
60p --> 30
1 --> 30/0.60p=50 piece,
So, 3---------50*3 = 150pieces.
Jalandhar said:
7 years ago
The coins are 25p, 10p, 5p.
So ratio of value among these coins is 25:10:5 = 5:2:1
The ratio of coins in the bag is 1:2:3,
Multiply both ratios.
1:2:3
5:2:1
= 5:4:3.
5p coins are = 3/12 * 30 = 7.5 rupees.
For 1 rupee 20 5p coins, then for 7.5 rupees 5p coins = 7.5*20=150.
So ratio of value among these coins is 25:10:5 = 5:2:1
The ratio of coins in the bag is 1:2:3,
Multiply both ratios.
1:2:3
5:2:1
= 5:4:3.
5p coins are = 3/12 * 30 = 7.5 rupees.
For 1 rupee 20 5p coins, then for 7.5 rupees 5p coins = 7.5*20=150.
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.
Janu said:
7 years ago
I can't understand. Please, anyone, help me to get this.
Mahaveer kumar said:
7 years ago
Thanks @Divyanshu.
Jenny said:
7 years ago
Thanks @Divyanshu your method is very easy.
But if you find the values for other 10 paise and 25 paise, the total amount Rs. 30 (given in the problem) is not matched with the final answer. Anyone can clear my doubt?
How to find the values for 10 paise and 25 paise? Please tell me.
But if you find the values for other 10 paise and 25 paise, the total amount Rs. 30 (given in the problem) is not matched with the final answer. Anyone can clear my doubt?
How to find the values for 10 paise and 25 paise? Please tell me.
Kalyani said:
7 years ago
Clear method, Thanks @Divyanshu.
Remi said:
7 years ago
1 Rupee = 100 paise
30Rs = 3000 paise.
25p : 10p : 5p = 1 : 2 : 3,
25*X + 10*2X + 5*3X = 3000,
60X = 3000,
X = 50,
25*50 = 1250,
10*2*50 = 1000,
5*3*50 = 750.
30Rs = 3000 paise.
25p : 10p : 5p = 1 : 2 : 3,
25*X + 10*2X + 5*3X = 3000,
60X = 3000,
X = 50,
25*50 = 1250,
10*2*50 = 1000,
5*3*50 = 750.
Akshayjr. said:
6 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:
6 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?
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