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# Marshall bought a set of encyclopedias on the installment plan. How

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Math Expert
Joined: 02 Sep 2009
Posts: 56257
Marshall bought a set of encyclopedias on the installment plan. How  [#permalink]

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19 Feb 2018, 22:52
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Difficulty:

25% (medium)

Question Stats:

83% (00:39) correct 17% (00:21) wrong based on 26 sessions

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Marshall bought a set of encyclopedias on the installment plan. How much money does he still owe on the encyclopedias?

(1) He has already paid \$384.

(2) He still owes 12 monthly payments of \$36 dollars each.

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Posts: 1074
Re: Marshall bought a set of encyclopedias on the installment plan. How  [#permalink]

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19 Feb 2018, 23:53
Bunuel wrote:
Marshall bought a set of encyclopedias on the installment plan. How much money does he still owe on the encyclopedias?

(1) He has already paid \$384.

(2) He still owes 12 monthly payments of \$36 dollars each.

To know how much Marshall owes we need to calculate the total amount minus how much he has paid.
We'll look for answers that give us this information, a Logical approach.

(1) gives only the sum so far without the total.
Insufficient.

(2) directly answers the question: he owes 12*36 dollars (we won't calculate this!)
Sufficient.

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Re: Marshall bought a set of encyclopedias on the installment plan. How   [#permalink] 19 Feb 2018, 23:53
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