### Alligation or Mixture

1. Explanation :

By the rule of alligation, we have: C.P. of 1 kg rice of 1st kind (in paise)
C.P. of 1 kg rice of 2nd kind (in paise)

1. Explanation :

. C.P. of 1 litre of milk = Rs. (20 x 2/3) = Rs. 40/3

1. Explanation :

Let C.P. of milk be Re. 1 per litre.
Then, S.P. of 1 litre of mixture = Re. 1. Gain obtained = 20%.
C.P. of 1 litre of mixture = Rs.[(100/120)* 1]=Rs.5/6 By the rule of alligation, we have:

1. Explanation :

. S.P. of 1 kg mixture = Rs. 7.20,Gain = 20%.
C.P. of 1 kg mixture = Rs.[(100/120)*7.20]=Rs. 6.
By the rule of alligation, we have:

1. Explanation :

. Let the C.P. of milk be Re. 1 per litre
Milk in 1 litre mixture of A = 4/7litre; Milk in 1 litre mixture of B = 2/5 litre; Milk in 1 litre mixture of C = ½ litre
C.P. of 1 litre mixture in A = Re .4/7; C.P. of 1 litre mixture in B = Re.2/5 Mean price = Re.1/2
By the rule of alligation, we have: