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 3 of 13.
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.
Sandhiya said:
6 years ago
First convert 30rs to paise , ie 3000p.
Now, 25p:10p:5p = 1:2:3.
And given that, their sum is 3000p.
So, 25x + 10(2x) + 5(3x) = 3000 paise
60x = 3000
x=50.
So the value of 5p is 5*3*50 = 750.
But they asked No. Of 5p coins so, -> 750/5 = 150.
Now, 25p:10p:5p = 1:2:3.
And given that, their sum is 3000p.
So, 25x + 10(2x) + 5(3x) = 3000 paise
60x = 3000
x=50.
So the value of 5p is 5*3*50 = 750.
But they asked No. Of 5p coins so, -> 750/5 = 150.
(3)
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?
MANU said:
6 years ago
Ratio in amount in paisa 25:20:15.
No.of 5 paisa coins = (15x3000)/(60x5).
= 150 coins.
No.of 5 paisa coins = (15x3000)/(60x5).
= 150 coins.
(1)
GuruVardhan said:
6 years ago
Let 30rs = 300p.
So 1x+2x+3x = 300.
x = 50.
So 1x:2x:3x = 50:100:150.
Ans is 150.
So 1x+2x+3x = 300.
x = 50.
So 1x:2x:3x = 50:100:150.
Ans is 150.
(1)
Swapnil said:
7 years ago
Agree @Manu.
Please, someone, clarify it clearly.
Please, someone, clarify it clearly.
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?
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.
Raju said:
7 years ago
1 Rs = 100 praise
25p,10p,5p.
Ratio = 1:2:3.
Then 25*x + 10*2x + 5*3x = 30*100.
25x + 20x + 15x = 3000.
60x = 3000.
X = 3000/60.
X = 50.
25p,10p,5p.
Ratio = 1:2:3.
Then 25*x + 10*2x + 5*3x = 30*100.
25x + 20x + 15x = 3000.
60x = 3000.
X = 3000/60.
X = 50.
(1)
Bratish said:
7 years ago
25 paisa=1/4 rupee.
10 paisa=1/10 rupee.
5 paisa=1/20 rupee.
Assume that;
x/4:2x/10:3x/20.
then simplify ratio.
5x:4x:3x.
Then;
5x+4x+3x=30.
x=30/12;
So 3x rupees means
(30/12)*3=7.5;
and 5 paisa means
7.5*20=150.
10 paisa=1/10 rupee.
5 paisa=1/20 rupee.
Assume that;
x/4:2x/10:3x/20.
then simplify ratio.
5x:4x:3x.
Then;
5x+4x+3x=30.
x=30/12;
So 3x rupees means
(30/12)*3=7.5;
and 5 paisa means
7.5*20=150.
(1)
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