**Question:**

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 new mixture is worth Rs 153 per kg, the price of the third variety per kg will be:

A) 164.25

B) 169.50

C) 170.0

D) 175.50

E) 180

Please also tell how to deal with such problems.