In what ratio should rice at Rs.9.30 per Kg be mixed with rice at Rs. 10.80 per Kg so that the mixture
be worth Rs.10 per Kg ? Choose the correct answer:
A) 7 : 8
B) 8 : 7
C) 6 : 7
D) 7 : 6
E) None of these
Explanation :   By the rule of alligation, we have   Cost of 1 kg rice of 1st kind Cost of 1 kg rice of 2nd kind   9.3 10.80   Mean Price   10   10.8-10= 
<gadget id="calculator">10.8-10</gadget>
<output>0.8</output>
.8 10 - 9.3= .7   Required ratio = .8 : .7 = 8 : 7.   Answer : Option 8 : 7
<result>B</result>
In what ratio should rice at Rs.9.30 per Kg be mixed with rice at Rs. 10.80 per Kg so that the mixture
be worth Rs.10 per Kg ?