Question: in what ratio must tea at rs . 64 per kg be mixed with tea at rs . 74 per kg so that the mixture must be worth rs . 69 per kg ?
A) 1 : 1
B) 3 : 2
C) 4 : 3
D) 5 : 3
E) none
Correct answer: A
Grade: 7 | Topic: Ratios and proportions | Difficulty: Hard | Standard: 7.RP.A.3