In what ratio should a variety of rice costing Rs. 6 per kg be mixed with another variety of rice costing Rs. 8.75 per kg to obtain a mixture costing Rs. 7.50 per kg?  Choose the correct choice from the following answers.
A) 5/6
B) 6/5
C) 7/3
D) 5/9
E) 5/3
Let us say the ratio of the quantities of cheaper and dearer varieties   = x : y   By the rule of allegation,   x/y = (87.5 - 7.50) / (7.50 - 6) = 5/6   5/6nswer:5/6
<result>A</result>
In what ratio should a variety of rice costing Rs. 6 per kg be mixed with another variety of rice costing Rs. 8.75 per kg to obtain a mixture costing Rs. 7.50 per kg?