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The price of a coat
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23 Jan 2018, 14:45
23 Jan 2018, 14:45
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Question Stats:
72% (00:44) correct
28% (00:28) wrong based on 100 sessions
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The price of a coat is P dollars
Quantity A |
Quantity B |
Sale price of the coat after 3 separate discounts of 10% |
Sale price of the coat after a single discount of 30% |
A) Quantity A is greater.
B) Quantity B is greater.
C) The two quantities are equal.
D) The relationship cannot be determined from the information given.
Kudos for right answer and explanation
Re: The price of a coat
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24 Jan 2018, 02:50
24 Jan 2018, 02:50
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S.P of Quantity A: 90%(90%(90% of 10)===>7.29
S.P of Quantity B: 70% of 10===> 7
Therefore Quantity A is greater
S.P of Quantity B: 70% of 10===> 7
Therefore Quantity A is greater
Re: The price of a coat
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24 Jan 2018, 11:00
24 Jan 2018, 11:00
Exact calculation is unnecessary.
Start by rewriting the quantities (use the interest formula):
A B
0.9³*P 0.7*P
Note that 0.9 to the power of 3 must be bigger than 0.7
---> A is bigger
Start by rewriting the quantities (use the interest formula):
A B
0.9³*P 0.7*P
Note that 0.9 to the power of 3 must be bigger than 0.7
---> A is bigger
