in a powder mix two varieties of powders costing Rs. 15 and Rs. 20 per kg respectively so as toget a mixture worth Rs. 16.50 kg?
Choose the correct option:
A) 1:3	B) 2:5	C) 7 : 3	D) 7:5	E) 5:8
By the rule of alligation:   Cost of 1 kg pulses of 1st kindCost of 1 kg pulses of 2nd kind   Rs. 15	Mean Price   Rs. 16.50	Rs. 20   3.50	1.50   Required rate = 3.50 : 1.50 = 7 : 3   7 : 3
<result>C</result>
in a powder mix two varieties of powders costing Rs. 15 and Rs. 20 per kg respectively so as toget a mixture worth Rs. 16.50 kg?