one kilo gram coffee is Rs. 126 and Rs. 135 are mixed with a third variety in the ratio 1 : 1 : 2. If the mixture is worth Rs. 153 per kg, the price of the 3rd variety per kilo gram is?  Choose the most appropriate option.
A) 150  B) 133  C) 175.5  D) 178  E) 190
Since first and second varieties are mixed in equal proportions.   So, their average price = Rs. 126 + 135 = Rs. 130.50   2   So, the mixture is formed by mixing two varieties, one at Rs. 130.50 per kg and the other at say, Rs. x per kg in the ratio 2 : 2, i.e., 1 : 1. We have to find x.   By the rule of alligation, we have:   Cost of 1 kg of 1st kindCost of 1 kg tea of 2nd kind   Rs. 130.50	Mean Price   Rs. 153	Rs. x   (x - 153)	22.50   x - 153	= 1   22.50   x - 153 = 22.50   x = 175.50   175.5
<result>C</result>
one kilo gram coffee is Rs. 126 and Rs. 135 are mixed with a third variety in the ratio 1 : 1 : 2. If the mixture is worth Rs. 153 per kg, the price of the 3rd variety per kilo gram is?