In what ratio must rice of Rs.54per kg be mixed with rice of Rs.35 per kg so that cost of mixture is Rs.42 per kg? Choose the correct choice: A) 9:7 B) 7:12 C) 12:7 D) 5:6 E) 7:9
(42-35)/(54-42)=7/12=7:12   ANSWER:7:12
<result>B</result>
In what ratio must rice of Rs.54per kg be mixed with rice of Rs.35 per kg so that cost of mixture is Rs.42 per kg?