In what ratio must rice at Rs.7.10 be mixed with rice at Rs.9.20 so that the mixture may be worth
Rs.8 per Kg? Choose the correct option:
A) 5 : 4
B) 2 : 1
C) 3 : 2
D) 4 : 3
E) None of these
Explanation :   By the rule of alligation, we have   CP of 1 kg Rice of 1st kind CP of 1 kg Rice of 2nd kind   7.1 9.2   Mean Price   8   9.2 - 8= 
<gadget id="calculator">9.2 - 8</gadget>
<output>1.2</output>
1.2 8 - 7.1= .9   Required ratio = 1.2 : .9 = 12 : 9 = 4 : 3   Answer : Option 4 : 3
<result>D</result>
In what ratio must rice at Rs.7.10 be mixed with rice at Rs.9.20 so that the mixture may be worth
Rs.8 per Kg?