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Carrie, Lisa, and Betty all make purchases at a music store that sell
[#permalink]
28 Jul 2016, 05:32
28 Jul 2016, 05:32
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Difficulty:
25%
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Question Stats:
77% (00:51) correct
23%
(01:06)
wrong
based on 41
sessions
Carrie, Lisa, and Betty all make purchases at a music store that sells all records for a certain price and all CDs for a certain price. How much does Carrie pay for 1 record and 2 CDs?
(1) Lisa bought 3 records for $22.50.
(2) Betty bought 2 records and 4 CDs for $55.00.
(1) Lisa bought 3 records for $22.50.
(2) Betty bought 2 records and 4 CDs for $55.00.
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Re: Carrie, Lisa, and Betty all make purchases at a music store that sell
[#permalink]
28 Jul 2016, 05:45
28 Jul 2016, 05:45
1
Kudos
Let price of 1 record = R
and price of 1 CD = C
Amount paid by Carrie for 1 record and 2 CDs = R + 2C
(1) Lisa bought 3 records for $22.50.
3R = 22.5
=> R = 7.5
Not sufficient as we have no information about C
(2) Betty bought 2 records and 4 CDs for $55.00
2R + 4C = 55
=> R +2C = 27.5
Sufficient
Answer B
and price of 1 CD = C
Amount paid by Carrie for 1 record and 2 CDs = R + 2C
(1) Lisa bought 3 records for $22.50.
3R = 22.5
=> R = 7.5
Not sufficient as we have no information about C
(2) Betty bought 2 records and 4 CDs for $55.00
2R + 4C = 55
=> R +2C = 27.5
Sufficient
Answer B
Re: Carrie, Lisa, and Betty all make purchases at a music store that sell
[#permalink]
28 Jul 2016, 08:09
28 Jul 2016, 08:09
Bunuel wrote:
Carrie, Lisa, and Betty all make purchases at a music store that sells all records for a certain price and all CDs for a certain price. How much does Carrie pay for 1 record and 2 CDs?
(1) Lisa bought 3 records for $22.50.
No information on the cost of a CD
Insufficient
(2) Betty bought 2 records and 4 CDs for $55.00.
\(2r + 4c = $55\)
\(r + 2c = $27.50\)
Sufficient
(B) statement 2 alone is sufficient, but statement 1 alone is not sufficient to answer the question
