In what ratio must wheat at Rs.3.20 pe rkg be mixed with wheat at Rs.2.90 per kg so that the mixture be worth Rs.3.08 per kg	Options.
A) 3 : 4 B) 3 : 2 C) 3 : 5 D) 3 : 7 E) 2 : 3

Rationale: if 2 ingredients are mixed , then the required ratio is given by , the rule of allegation c . p of a unit quantity of cheaper ( c ) c . p . of a unit quantity of dearer ( d ) mean price ( m ) d - m m - c  required ratio is cheaper quantity : dearer quantity = ( d - m ) : ( m - c ) answer with explanation : given i . c . p of a unit quantity of i kind ( p ) = 3.20 ii . c . p of a unit quantity of ii kind ( p ) = 2.90 iii . mean price ( p ) = 3.08 iv . d – m = 3.08 – 2.90 = 0.18 v . m – c = 3.20 – 3.08 = 0.12  required ratio = 0.18 : 0.12 = 3 : 2 answer : b
Answer: B