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 12 of 12.
AKSHAY said:
1 decade ago
@HABIB
u must recheck your calculations...
As 25p*50= Rs.12.5
10p*100= Rs.10
5p*150= Rs.7.5
AND they all make Rs. 30......
u must recheck your calculations...
As 25p*50= Rs.12.5
10p*100= Rs.10
5p*150= Rs.7.5
AND they all make Rs. 30......
(1)
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!!!
Habib said:
1 decade ago
I think in the ques it should be 15rs then the answer is correct !
For 30Rs one shud note that 5p coins should be maximum than any other coins (25p & 10ps) since the ratio of coins is 1:2:3.
If 150 coins had to be the answer. Then 25p & 10p shud be lesser than this... which will not in anycase amount to 30rs.
For 30Rs one shud note that 5p coins should be maximum than any other coins (25p & 10ps) since the ratio of coins is 1:2:3.
If 150 coins had to be the answer. Then 25p & 10p shud be lesser than this... which will not in anycase amount to 30rs.
Srj said:
1 decade ago
Let the number of 25 p, 10 p and 5 p coins be x, 2x, 3x respectively.
25p of x,10p of 2x,5p of 3x;
25p=25/100=1/4;
10p=10/100=1/10;
5p=5/100=1/20;
1x/4 + 2x/10 + 3x/20=30;
5x+4x+3x=600;
12x=600 (3*50)
x=150
25p of x,10p of 2x,5p of 3x;
25p=25/100=1/4;
10p=10/100=1/10;
5p=5/100=1/20;
1x/4 + 2x/10 + 3x/20=30;
5x+4x+3x=600;
12x=600 (3*50)
x=150
Aparna said:
1 decade ago
Whenever we perform any calculations
first of all it should be converted into same units
here,
1Rs.=100ps
? =25ps
we get 25/100
first of all it should be converted into same units
here,
1Rs.=100ps
? =25ps
we get 25/100
Nitesh said:
1 decade ago
@ Nithyanantham.
Totally wrong, what you think it is not matter, matter is that what is written in question paper and another thing is that I've not seen this technique in mathematics may be this is advanced technique.
Totally wrong, what you think it is not matter, matter is that what is written in question paper and another thing is that I've not seen this technique in mathematics may be this is advanced technique.
Nithyanantham said:
2 decades ago
I think totally 30 Rs that is 30 one rupee so
1/6:2/6:3/6
30/6=5
5*20 25ps coin:10*100 10ps coin:15*20 5ps coin so
Ratio is 20:100:300
Answer is 300 5ps coins this is correct or wrong reply soon
1/6:2/6:3/6
30/6=5
5*20 25ps coin:10*100 10ps coin:15*20 5ps coin so
Ratio is 20:100:300
Answer is 300 5ps coins this is correct or wrong reply soon
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