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What is the best expression for ammount of a change C, received from

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What is the best expression for ammount of a change C, received from  [#permalink]

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New post 31 Jul 2019, 22:40
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A
B
C
D
E

Difficulty:

  35% (medium)

Question Stats:

59% (01:00) correct 41% (00:58) wrong based on 27 sessions

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Re: What is the best expression for ammount of a change C, received from  [#permalink]

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New post 31 Jul 2019, 23:48
Bunuel wrote:
What is the best expression for ammount of a change C, received from 1$ bill after buying N articles at 5 cents each ?

A. C=1-5N
B. C=100-5N
C. C=1-5+N
D. C=100-5/100N
E. C=1-N/5


What is the best expression for amount of a change C, received from 1$ bill after buying N articles at 5 cents each ?

Cost of buying N articles at 5 cents each = 5N cents
Money given = $1 = 100 cents
Change received (C) = 100 - 5N cents

IMO B
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Re: What is the best expression for ammount of a change C, received from  [#permalink]

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New post 03 Aug 2019, 21:29
Bunuel wrote:
What is the best expression for amount of a change C, received from 1$ bill after buying N articles at 5 cents each ?

A. C=1-5N
B. C=100-5N
C. C=1-5+N
D. C=100-5/100N
E. C=1-N/5


The cost of 1 article = 5 cents
--> Cost of N articles = 5N cents
1$ = 100 cents

--> Change received = 100 - 5N

Option B
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Re: What is the best expression for ammount of a change C, received from  [#permalink]

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New post 06 Aug 2019, 16:41
Bunuel wrote:
What is the best expression for ammount of a change C, received from 1$ bill after buying N articles at 5 cents each ?

A. C=1-5N
B. C=100-5N
C. C=1-5+N
D. C=100-5/100N
E. C=1-N/5



Since the total cost would be 5N cents and $1 = 100 cents, the change C is 100 - 5N cents.

Answer: B
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Re: What is the best expression for ammount of a change C, received from   [#permalink] 06 Aug 2019, 16:41

What is the best expression for ammount of a change C, received from

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