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 :

[a] By the rule of alligation: Cost of 1 kg rice of 1 st kind Cost of 1 kg rice of 2nd kind \[\therefore \] Required ratio = \[1.80:2.40=3\,:\,4\]