Alligations or Mixtures
Aptitude

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Q.

One quantity of wheat at Rs 9.30 per Kg is mixed with another quality at a certain rate in the ratio 8:7. If the mixture so formed be worth Rs 10 per Kg, what is the rate per Kg of the second quality of wheat?

 A.

Rs. 12.47

 B.

Rs. 10.80

 C.

Rs. 15.17

 D.

Rs. 47.66

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Solution:
Option(B) is correct

Let the rate of second quality be Rs x per Kg.
C.P of 1Kg wheat of 1st kind = 930p 
C.P of 1 Kg wheat of 2nd kind = 100x p 
Mean price = 1000p
By rule of alligation we have required ratio 8 : 7

   930                         x

 

         \                  /

        (Mean Price)
                (10)

         /                  \

 

   x-10        :          0.7     ::       8        :          7

So we get required ratio,  (x-10) : 0.7 :: 8 : 7
⇒ x = 10.80 per Kg


(1) Comment(s)


Sarvare
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wow...love it