In what ratio mental A at Rs.68 per kg be mixed with another metal at Rs.96 per kg so that cost of alloy (mixture) is Rs.75 per kg?
Choose the correct answer
A) 5:8  B) 3:1  C) 3:7  D) 9:5  E) 9:8
(96-75)/(75-68)=21/7= 
<gadget id="calculator">21/7</gadget>
<output>3</output>
3/1   ANSWER:3:1
<result>B</result>
In what ratio mental A at Rs.68 per kg be mixed with another metal at Rs.96 per kg so that cost of alloy (mixture) is Rs.75 per kg?