Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.50 a kg to produce a mixture worth Rs. 6.30 a kg Choose the correct choice from the following choices
A) 2:0
B) 2:3
C) 2:1
D) 8:9
E) 2:8
By the rule of alligation:   Cost of 1 kg rice of 1st kind Cost of 1 kg rice of 2nd kind   Required ratio = 80 : 90 = 8 : 9   Answer: 8:9
<result>D</result>
Find the ratio in which rice at Rs. 7.20 a kg be mixed with rice at Rs. 5.50 a kg to produce a mixture worth Rs. 6.30 a kg