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shikha

· started a discussion

· 1 Months ago

solution not understand

Question:

Values of 1 rupee, 50 paise and 25 paise coins in a bag are in ratio of 13:11:7. The total number of coins are 378. Find the number of 50 paise coins.

Options:
A) 132
B) 128
C) 136
D) 133
E) 124
Solution:
Ans: (a) Since ratio of their value is 13:11:7.

\(\therefore\) Ratio of their numbers is

13: 11 x 2: 7 x 4 = 13:22:28

Sum of the ratio

= 13 + 22 + 28= 63

Therefore,

Number of 50-paise coins

= \(\cfrac{22}{63}\) x 378 = 132 

Knowledge Expert

· commented

· 1 Months ago

@Arjun 828 is another question's answer is...which had been asked by @Chandi....

Arjun J

· commented

· 1 Months ago

what you dont? 11 x 2 and 7 x 4 . its because 11 is ratio of 50paisa value in rupees .so two 50p becomes one rupee so we multiply 2. same way for 25p we need 4 coins to make it one rupee so multiply by 4

Knowledge Expert

· commented

· 1 Months ago

828 is ans of your question...@Chandi

Knowledge Expert

· commented

· 1 Months ago

you have mixed the question with other doubt...i didn't get....ask now....

chandi

· commented

· 1 Months ago

sir,you didnt given reply for simple interest problem which i commented today

Knowledge Expert

· commented

· 1 Months ago

Good :) @Navneet

Naveen Kumar

· commented

· 1 Months ago

convert the value ratio into coin ratio therefore it is 13:22:28, Then total 63x coins.
63x=378, Therefore X=6
Then Total no of 50 paise coins = 22x= 22*6=132

Knowledge Expert

· commented

· 1 Months ago

Replace 'then' by 'than'....


“When opportunity came, it appeared in a different form and from a different direction than he had expected".

Knowledge Expert

· commented

· 1 Months ago

Hello Chandi, a silly mistake occurred in previous explanation...see this:

Number of one rupee=13x/1=13x

Number of 50 paise=11x/1/2 =22x

Number of 25paise = 7x/1/4 =28x

13x+22x+28x=378

So, x=6

Number of 50 paise coins=22*6=132

chandi

· commented

· 1 Months ago

1)when the opportunity came 2)it appeared 2) in a different form 3) and from a different 4) direction then he had 5)expected finding error

chandi

· commented

· 1 Months ago

13x+11x+7x=378 i taken this equation answer not coming for this

chandi

· commented

· 1 Months ago

13:11x2:7x4 how u divide this ratio

Knowledge Expert

· commented

· 1 Months ago

:)

shikha

· commented

· 1 Months ago

thank you

Knowledge Expert

· commented

· 1 Months ago

Number of one rupee=13x/1=13x

Number of 50 paise=11x/(1/2) =22x

Number of 25paise = 7x/(1/4) =28x

13x+22x+28x=378

therefore x=7

Number of 50 paise coins=22*7=132

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