Rice of rate Rs. 126 per kg and Rs. 135 per kg and 3^rd variety in the ratio 1 : 1 : 2. If the final mixture is worth Rs. 153 per kg, what is the rate of the third variety per kg?
(A) 165.4
(B) 170
(C) 169
(D) 175.5


Answer: (D)

Explanation: Rice worth Rs. 126 per kg and Rs. 135 per kg are mixed in the ratio 1 : 1
So their average price =(126+135)/2=130.5

Now there are two mixtures one of rate 130.5 /kg and another is of rate say x /kg

130.5               x

153

x-153              153-130.5

x-153/22.5=1/1

x = 175.50

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