Final answer:
The cost of the mixture per kg is $20. None of the option is correct
Step-by-step explanation:
To find the cost of the mixture per kg, we need to calculate the weighted average of the cost per kg of ginger and garlic. The total cost of ginger is 5 kg x $24/kg = $120. The total cost of garlic is 10 kg x $18/kg = $180. The total cost of the mixture is $120 + $180 = $300. The total weight of the mixture is 5 kg + 10 kg = 15 kg.
Therefore, the cost of the mixture per kg is $300 / 15 kg = $20/kg.
None of the option is correct