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Pencils cost 20 cents each. The price per dozen is 10 percent cheaper.

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Sajjad1994
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Pencils cost 20 cents each. The price per dozen is 10 percent cheaper. [#permalink] New post   23 Sep 2020, 04:51
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Pencils cost 20 cents each. The price per dozen is 10 percent cheaper. What is the cost of a dozen pencils?

A. 2.4

B. 2.3

C. 2.28

D. 2.16

E. 2
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Re: Pencils cost 20 cents each. The price per dozen is 10 percent cheaper. [#permalink] New post   23 Sep 2020, 07:24
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Cost of 1 pencil is 20 cents = $0.2

Cost of 1 dozen (Without reduction) = 12 * 0.2 = $2.4

Since there is a 10% discount on buying a dozen, therefore the price = \(2.4 * \frac{90}{100} = $2.16\)


Option D

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Re: Pencils cost 20 cents each. The price per dozen is 10 percent cheaper. [#permalink] New post   23 Sep 2020, 08:57
SajjadAhmad wrote:
Pencils cost 20 cents each. The price per dozen is 10 percent cheaper. What is the cost of a dozen pencils?

A. 2.4

B. 2.3

C. 2.28

D. 2.16

E. 2



IMO D.

Sol:
price for each pencil=.2 then price for 12 penciles=12*.2=2.4

The price is 10% cheaper=2.4-.24=2.16
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Re: Pencils cost 20 cents each. The price per dozen is 10 percent cheaper. [#permalink] New post   23 Sep 2020, 09:39
Cost of 1 pencil is 20 cents = 0.2

Cost of 1 dozen = 12 * 0.2 = 2.4

price for 1 dozen is cheaper by 10%, therefore the price = 2.4-2.4*.1=2.16
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Re: Pencils cost 20 cents each. The price per dozen is 10 percent cheaper. [#permalink]
23 Sep 2020, 09:39
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