Tea worth Rs. 126 per kg and Rs. 135 per kg are mixed with a third variety in th

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Tea worth Rs. 126 per kg and Rs. 135 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:

Options:

A . Rs. 169.50

B . Rs. 170

C . Rs. 175.50

D . Rs. 180

Answer: Option C

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 1^st kind
Cost of 1 kg tea of 2^nd 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

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