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Alligation or Mixture

Q1:

Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.70 a kg to produce a mixture worth Rs. 6.30 a kg.

A 1 : 3

B 2 : 3

C 3 : 4

D 4 : 5

ANS:B - 2 : 3

By the rule of alligation:

Cost of 1 kg of 1st kind Cost of 1 kg of 2nd kind
720 p Mean Price
630 p 		570 p
60 90
Required ratio = 60 : 90 = 2 : 3.



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