Tea worth Rs.126 per kg 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 third variety per kg will be	Select:
A) Rs.169.50  B) Rs.1700  C) Rs. 175.50  D) Rs. 180  E) None
Solution   Since first second varieties are mixed in equal proportions, so their average price = Rs.(126+135/2) = Rs.130.50   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.   x-153/22.50 = 1 =› x - 153 = 22.50 =› x=175.50.   Hence, price of the third variety = Rs.175.50 per kg.   Answer Rs. 175.50
<result>C</result>
Tea worth Rs.126 per kg 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 third variety per kg will be