question_answer

The ratio in which a man must mix rice at \[Rs.10.20\]per kg and \[Rs.14.40\] per kg so as to make a mixture worth \[Rs.12.60\]per kg, is

A)  \[3:4\]                         

B)  \[4:3\]             

C)  \[2:5\]                         

D)  \[18:24\]

Correct Answer: A

Solution :

By the rule of alligation: \[\therefore \] Required ratio \[=1.80:2.40=3:4.\]