Question 856535
A dealer buys oranges of two quantities one at Rs. 12 a dozen and the other at Rs.8 a dozen. These were mixed up and he sells them at 15 per Rs.12 and thereby makes 5%(5percent) on his total outlay. The ratio of the number of oranges of the two kinds is ? (A) 2:5 (B)3:5 (C) 4:5 (D)1:5.  WHICH IS THE ANSWER FOR THIS PROBLEM.DOES ALLIGATION RULE APPLY ?
lowest price  per dozen = Rs 8
highest price  per dozen =  Rs 12 
sp for 15 for Rs 12 = Rs 9.6 per dozen
  mixture  price  will be 9.6 /1.05= per  Dozen RS 09.1428
alligation Ratio=highest price-mixture price / mixture  price- lowest price 
  
Ratio=12-9.14/9.14-8=2.86/1.14=286/114=143/57=2/5 approxymately