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# One bought x number of pen at rate of 7 tk and 2x number of another pe

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VP
Joined: 31 Oct 2013
Posts: 1489
Concentration: Accounting, Finance
GPA: 3.68
WE: Analyst (Accounting)
One bought x number of pen at rate of 7 tk and 2x number of another pe  [#permalink]

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30 Nov 2019, 06:09
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Question Stats:

33% (03:56) correct 67% (03:49) wrong based on 3 sessions

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One bought x number of pen at rate of 7 tk and 2x number of another pen at rate of 10 tk. Sell them 96 tk/ dozen and made loss 720 tk. How many pens he bought?

A)120
B)140
C)240
D)260
E)300
Manager
Joined: 16 Sep 2011
Posts: 107
One bought x number of pen at rate of 7 tk and 2x number of another pe  [#permalink]

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30 Nov 2019, 06:51
KSBGC wrote:
One bought x number of pen at rate of 7 tk and 2x number of another pen at rate of 10 tk. Sell them 96 tk/ dozen and made loss 720 tk. How many pens he bought?

A)120
B)140
C)240
D)260
E)300

tk seems currency of some nation
Total cost of x pen @ 7tk= x*7=7x
Tost cost of 2x pen @10tk = 2x*10=20x

Loss = 720= Buy Price - sell Price
Sell price = 96/dozen= 96/12=8/pen
total pen bought = 3x (x@7 & 2x@10)
hence 720 = (7x+20x)-8*3x=3x
hence x= 240

Option C
One bought x number of pen at rate of 7 tk and 2x number of another pe   [#permalink] 30 Nov 2019, 06:51
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