Ratna buys 10 kg of rice for ₹88 per kg and another 20 kg of rice for ₹187 per kg. What is the per kg cost (in ₹) of the total mixture of rice for her?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 154.
The first type of rice:
Total cost = 10 × 88 = ₹880
The second type of rice:
Total cost = 20 × 187 = ₹3740
So,
Total cost = 880 + 3740 = ₹4620
Total quantity = 10 + 20 = 30
Now,
Cost per kg = 4620/30 = ₹154