Alligations or Mixtures
Aptitude

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Q.

In what proportion must rice at Rs. 3.10 per kg be mixed with rice at Rs. 3.60 per kg so that the mixture be worth Rs. 3.25 per kg?

 A.

3 : 7

 B.

5 : 3

 C.

3 : 5

 D.

7 : 3

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Solution:
Option(D) is correct

C.P of a unit quantity of 1st kind  = 310p (in paise)
C.P of a unit quantity of 2nd kind  = 360p
Mean price = 325p

C.P of unit quantity         C.P of unit quantity

of 1st kind                         of 2nd kind

    (310p)                         (360p)

 

                     \                       /
                        Mean Price

                         (325p)

                    /                        \

 

 (360 – 325)          :           (325 – 310)

       35                                       15


Required ratio = 35 : 15 = 7 : 3
They must be mixed in the ratio 7 : 3


(1) Comment(s)


Sarah
 ()

Great questions!! It would be nice if you could upload more questions on Alligations...