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alimad
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A restaurant sells a sandwich discount card for $180, which 27 Jul 2006, 13:31
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A restaurant sells a sandwich discount card for $180, which entitles the holder to a 20% discount on all sandwiches for one year. Last year, regular sandwiches cost $4.50, while gourmet sandwiches cost either $7.00 or $12.00. Sandy did not buy a discount card last year. Would she have saved money by doing so?

(1) She bought 150 sandwiches last year, 80% of which were not gourmet sandwiches.
(2) She spent $285 on gourmet sandwiches last year.



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bondguy
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A restaurant sells a sandwich discount card for $180, which 27 Jul 2006, 20:26
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alimad
A restaurant sells a sandwich discount card for $180, which entitles the holder to a 20% discount on all sandwiches for one year. Last year, regular sandwiches cost $4.50, while gourmet sandwiches cost either $7.00 or $12.00. Sandy did not buy a discount card last year. Would she have saved money by doing so?

(1) She bought 150 sandwiches last year, 80% of which were not gourmet sandwiches.
(2) She spent $285 on gourmet sandwiches last year.
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1. minimum expenditure on gourment sandwiches = 30 gour. sandwiches (20% of 150) = 30*7 = 210 , she would have saved money

2. second statement seems obvious.
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v1rok
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A restaurant sells a sandwich discount card for $180, which 27 Jul 2006, 21:00
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I've got (A)

ST1. 80% of 150 equal 120 regular sandwiches. So,

150 = 120 reg + 30 gourmet

W/o card, 120*$4.50 = $540 total on regular
Let's pick the most expenosve for gourmet, for $12/each. Then 30*$12 = $360 on gourmet sandwiches. Total, w/o card, 540+360 = 900.

If she used the card, she would have saved 0.2*$900 = $180 on sandwiches, but it is not exceed the cost of the card. So, it is sufficient to answer the question.

ST2. Wide open for various possibiities. Not suff.

So, (A)
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v1rok
I've got (A)

ST1. 80% of 150 equal 120 regular sandwiches. So,

150 = 120 reg + 30 gourmet

W/o card, 120*$4.50 = $540 total on regular
Let's pick the most expenosve for gourmet, for $12/each. Then 30*$12 = $360 on gourmet sandwiches. Total, w/o card, 540+360 = 900.

If she used the card, she would have saved 0.2*$900 = $180 on sandwiches, but it is not exceed the cost of the card. So, it is sufficient to answer the question.

ST2. Wide open for various possibiities. Not suff.

So, (A)
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great , i thought there was a twist to the question but couldn't catch it.

wouldn't you be able to buy sandiwiches with $180 dollars sandwich card ?
but yeah your approach makes more sense if $180 was the cost incurred on top of the sandwich cost.
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jaynayak
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A restaurant sells a sandwich discount card for $180, which 27 Jul 2006, 23:30
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A

1) Regular sandwich = 120
Cost of regular = 120*4.5 = 540

Let the rest of the gourmet be of 12 each
Hence cost = 30*12 = 360

Total cost = 900
With a discount card cost = 900*20/100 = 180

Cost of discount card = 180
Hence no money saved.

2) not enough information
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defenestrate
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A restaurant sells a sandwich discount card for $180, which 29 Jul 2006, 00:00
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so we need 900 dollars for it to make sense to buy the card. I assume all gourmet are the least expensive (otherwise insuff)

I 730 insuf

2. not enough info

3. 805 together insuf.



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