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Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of ri

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Bunuel
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Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of ri [#permalink] New post   13 Jan 2020, 09:12
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Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of rice costing Rs. 50 per kg. What is the average cost price per kg of rice Jim bought?

A. 40.5
B. 41.5
C. 42.5
D. 43.5
E. 44.5
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C
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Re: Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of ri [#permalink] New post   13 Jan 2020, 15:27
Average Price/kg = total monetary value / total number of kg
Total monetary value = (32 Rs/kg * 5 kg) + (50 Rs/kg * 7kg) = 160 Rs + 350 Rs = 510 Rs
Total number of kg = 5 + 7 = 12
Average Price/kg = 510/12 = 42.5 Rs/kg
Ans=C
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Re: Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of ri [#permalink] New post   14 Jan 2020, 08:08
Bunuel wrote:
Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of rice costing Rs. 50 per kg. What is the average cost price per kg of rice Jim bought?

A. 40.5
B. 41.5
C. 42.5
D. 43.5
E. 44.5

\(\frac{32*5 + 50*7}{5+7}\)

\(=\frac{160 + 350}{12}\)

\(=\frac{510}{12}\)

\(=42.50\), Answer must be (C)
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Re: Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of ri [#permalink] New post   21 Jan 2020, 09:00
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Bunuel wrote:
Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of rice costing Rs. 50 per kg. What is the average cost price per kg of rice Jim bought?

A. 40.5
B. 41.5
C. 42.5
D. 43.5
E. 44.5


We can calculate the weighted average:
[32(5) + 50(7)] / (5 + 7)

(160 + 350) / 12 = 510/12 = 42.5

Answer: C
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Re: Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of ri [#permalink] New post   21 Jan 2020, 09:30
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Solution



Given
In this question, we are given that
    • Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of rice costing Rs. 50 per kg.

To find
We need to determine
    • The average cost price per kg of rice Jim bought.

Approach and Working out
Total price of first type of rice = 32 x 5 = 160
Total price of second type of rice = 50 x 7 = 350
    • Total price of all the rice bought = (160 + 350) = 510
    • Total amount of rice bought = 5 + 7 = 12 kg

Hence, the average cost price per kg of rice bought = 510/12 = 42.50

Thus, option C is the correct answer.

Correct Answer: Option C
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Re: Jim bought 5 kgs of rice costing Rs. 32 per kg and another 7 kgs of ri [#permalink]
21 Jan 2020, 09:30
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