in what ratio should a variety of rice costing rs . 10 per kg be mixed with another variety of rice costing rs . 13.25 per kg to obtain a mixture costing rs . 10.75 per kg ?
"let us say the ratio of the quantities of cheaper and dearer varieties = x : y by the rule of allegation , x / y = ( 13.25 - 10.75 ) / ( 10.75 - 10 ) = 6 / 3 = 2 / 1 answer : a"
divide(divide(subtract(13.25, 10.75), subtract(13.25, 10)), subtract(const_1, divide(subtract(13.25, 10.75), subtract(13.25, 10))))