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A certain store sells only shirts and ties. e price of a shirt is $40

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A certain store sells only shirts and ties. e price of a shirt is $40  [#permalink]

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New post 21 Jan 2019, 01:27
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A
B
C
D
E

Difficulty:

  25% (medium)

Question Stats:

88% (01:32) correct 12% (01:47) wrong based on 19 sessions

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Re: A certain store sells only shirts and ties. e price of a shirt is $40  [#permalink]

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New post 21 Jan 2019, 03:20
40S+20T = 340
2S+T = 17
Also, S+T = 10, T = 10-S
2S+10-S = 17
S = 7

E is the answer.
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Re: A certain store sells only shirts and ties. e price of a shirt is $40  [#permalink]

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New post 21 Jan 2019, 03:49
Bunuel wrote:
A certain store sells only shirts and ties. The price of a shirt is $40 and the price of a tie is $20. If Bob pays $340 for 10 items from this store, how many shirts did he purchase?

A 3
B 4
C 5
D 6
E 7



Back solve the question.

shirt/piece = 40

tie/piece = 20

Total price = 340.

Total 10 items. Given choices are the number of shirts.

Option E) 7 shirts. So, tie must be 3.

7 * 40 = 280

3 * 20 = 60.

280 + 60 = 340.
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Re: A certain store sells only shirts and ties. e price of a shirt is $40  [#permalink]

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New post 21 Jan 2019, 08:11
Bunuel wrote:
A certain store sells only shirts and ties. The price of a shirt is $40 and the price of a tie is $20. If Bob pays $340 for 10 items from this store, how many shirts did he purchase?

A 3
B 4
C 5
D 6
E 7


\(40s + 20t = 340\)

Or, \(2s + t = 17\)

Further , \(s + t = 10\)

Substitute \(t = 10 - s\) and solve

\(2s + 10 - s = 17\)

Or, \(s = 7\) , Thus Answer must be (E)
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Re: A certain store sells only shirts and ties. e price of a shirt is $40   [#permalink] 21 Jan 2019, 08:11
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