in what proportion must rice at rs 3.10 per kg be mixed with rice at rs 3.75 per kg, so that the mixture be worth rs 3.25 a kg? Answers:	A) 7 / 3	B) 5 / 3	C) 10 / 3	D) 3 / 7	E) 11 / 5
<gadget id="calculator">3.75 - 3.25</gadget>
<output>0.5</output>

<gadget id="calculator">3.25 - 3.1</gadget>
<output>0.15</output>

<gadget id="calculator">0.5 / 0.15</gadget>
<output>3.333333</output>

<result>C</result>
in what proportion must rice at rs 3.10 per kg be mixed with rice at rs 3.75 per kg, so that the mixture be worth rs 3.25 a kg?
divide(subtract(3.75, 3.25), subtract(3.25, 3.1))
c . p of 1 kg of cheaper rice = rs 3.10 c . p of 1 kg of expensive rice = rs 3.75 the mixture be worth for 1 kg = rs 3.25 by the alligation rule : quantity of cheaper rice / quantity of expensive rice = ( 3.75 - 3.25 ) / ( 3.25 - 3.10 ) = ( 0.50 ) / ( 0.15 ) = 10 / 3 c