in what ratio should a variety of rice costing rs. 6.5 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 one.
A) 5 / 6
B) 5 / 9
C) 5 / 4
D) 5 / 3
E) 7 / 6
<gadget id="calculator">8.75 - 7.5</gadget>
<output>1.25</output>

<gadget id="calculator">8.75 - 6.5</gadget>
<output>2.25</output>

<gadget id="calculator">1.25 / 2.25</gadget>
<output>0.555556</output>

<gadget id="calculator">1 - 0.555556</gadget>
<output>0.444444</output>

<gadget id="calculator">0.555556 / 0.444444</gadget>
<output>1.250002</output>

<result>C</result>
in what ratio should a variety of rice costing rs. 6.5 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?
divide(divide(subtract(8.75, 7.50), subtract(8.75, 6.5)), subtract(const_1, divide(subtract(8.75, 7.50), subtract(8.75, 6.5))))
"let us say the ratio of the quantities of cheaper and dearer varieties = x : y by the rule of allegation , x / y = ( 8.75 - 7.50 ) / ( 7.50 - 6.5 ) = 5 / 4 answer : c"