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# A shopkeeper purchases a packet of 50 pens at \$10 per pen.

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PS Forum Moderator
Joined: 18 Jan 2020
Posts: 1547
Location: India
GPA: 4
A shopkeeper purchases a packet of 50 pens at \$10 per pen.  [#permalink]

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03 Jul 2020, 02:17
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(N/A)

Question Stats:

80% (02:31) correct 20% (02:34) wrong based on 5 sessions

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A shopkeeper purchases a packet of 50 pens at \$10 per pen. He sells a part of the packet at a profit of 30%. On the remaining part, he incurrs a loss of 10%. If his overall profit on the whole packet is 10%. Find the number of pens he sold at profit.

A. 28
B. 25
C. 17
D. 20
E. 23

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Director
Joined: 16 Feb 2015
Posts: 657
Location: United States
Re: A shopkeeper purchases a packet of 50 pens at \$10 per pen.  [#permalink]

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03 Jul 2020, 03:06
Explanation:

13x + 9(50-x) = 550
13x - 9x = 550 -450
4x = 100
x = 25

IMO-B
Re: A shopkeeper purchases a packet of 50 pens at \$10 per pen.   [#permalink] 03 Jul 2020, 03:06