In what ratio should a variety of wheat costing Rs. 3 per kg be mixed with another variety of wheat costing Rs. 6.25 per kg to obtain a mixture costing Rs. 4.50 per kg?	Choose one
A) 8 : 6 B) 7 : 6 C) 5 : 6 D) 7 : 5 E) 6 : 7
Let us say the ratio of the quantities of cheaper and dearer varieties = x : y   7 : 6y the rule of allegation, x/y = (6.25 - 4.50) / (4.50 - 3) = 7/6   ANSWER:7 : 6
<result>B</result>
In what ratio should a variety of wheat costing Rs. 3 per kg be mixed with another variety of wheat costing Rs. 6.25 per kg to obtain a mixture costing Rs. 4.50 per kg?