Aptitude - Ratio and Proportion - Discussion

Please give the proper answer with solution.

My answer came 300 coins.

Rs. 30 = 30*100 = 3000 p.

Ratio = 1:2:3 then 3000*3/6 = 1500 p.

i.e. 1500/5 = 300.

Therefore, there are 300 5p coins.

Isn't it correct? Please explain me.

The right answer is 150.

We can not equate quantity to value e.g 1:2:3 or 1x+2x+3x(Q) = 3000(V).

We should equate value to value e.g 25p 10p 5p or 25x 20x 15x(V) = 3000(V).

that makes 60x=3000 and x=50.

Proof:

With the answer 150 5p coins we get,

1:2:3 = 50 100 150 , 25p 10p 5p respectively makes a value of 3000p and it is logical with the given ratio 1:2:3/50:100:150 [50 coins of 25p] [100 coins of 10p] and [150 coins of 5p].

Whereas, with the answer 300 5p coins we get,

1:2:3 = 20 100 300 , 25p 10p 5p respectively, also makes a value of 3000p but it is illogical with the ratio. It can't be 1:2:3/20:100:300.

Hope you got it :).

Total amount according to ratio is (1x25+2x10+3x5) = 60 paise.

If 60 paise ----> 3000 paise.

Then 5 paise-----> ? (5x3000/60=50).

Hence the answer is : 50 x 3 = 150( here 3 is ratio of 5p).

If and 300 means,

As per the ratio: 100*25 +200*10 +300*5.
= 2500+2000+1500.
=6000 Paise.

So 60Rs came. So that is wrong.

If answer is 150 means,

50*25+100*10+150*5 = 1250+1000+750 = 3000.

Rs 30... So 150 is the correct answer.

In a wallet, there are 50 p, 25 p and 1 Rs coins in the ratio 6 : 8 : 5. If the wallet contains Rs. 210 in total, find the number of 1 Rupee coins?

How will you get in last step 3?

Can you please explain.

Please answer.

A bag contains coins of 1rs, 50p, 25p in the ratio of their value as 13:11:7.

The total number of coins in the bag are 378, find 25p coins in a bag.

25p : 10p : 5p = 1 : 2 : 3 = Rs.30.
1rs = 4 * 25p (or) 25p = 1/4.
Similarly, 10p = 1/10 and 5p = 1/20.
x/4 + 2x/10 + 3x/20 = 30.
x = 50
Answer:

25p = 50.
10p = 100.
5p = 150.

Could you explain why we do not take the sum of ratios in the denominator i.e. (25x/100 + 20x/100 + 15x/100)/6 ?

Because in some problems they have considered the values like 150*2 + 25*2 and then have divided by sum of ratios i.e 4. Please clarify it.