How many kilogram of sugar costing Rs. 9 per kg must be mixed with 27 kg of…
2019
How many kilogram of sugar costing Rs. 9 per kg must be mixed with 27 kg of sugar costing Rs. 7 per kg so that the mixture costs Rs. 8.4 per kg?
- A.
63 kg
- B.
Rs 60/kg
- C.
Rs 49/kg
- D.
Rs. 44/kg
Attempted by 5 students.
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Correct answer: A
Let x kg of sugar costing Rs. 9 per kg be mixed. The weighted average condition is (9x + 7 x 27) / (x + 27) = 8.4. Solving gives 0.6x = 37.8, so x = 63 kg.