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What is the total cost to make 7 long distance telephone

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by BTGmoderatorDC » Fri May 31, 2019 8:15 pm

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Answers

A

B

C

D

E

Stats

Difficulty—

What is the total cost to make 7 long distance telephone calls?

(1) The length of each call was at least 2 minutes.
(2) The rate for long distance calls is $0.32 per minute

OA E

Source: Princeton Review
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Source: — Data Sufficiency |

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by Brent@GMATPrepNow » Sat Jun 01, 2019 4:39 am
BTGmoderatorDC wrote:What is the total cost to make 7 long distance telephone calls?

(1) The length of each call was at least 2 minutes.
(2) The rate for long distance calls is $0.32 per minute

OA E

Source: Princeton Review
When we SCAN the statements, we see the key phrase: at least
This allows us to jump straight to...

Statements 1 and 2 combined
There are infinitely many scenarios that satisfy BOTH statements. Here are two:
Case a: Each call was 2 minutes long, for a total of 14 minutes. At $0.32 per minute, the answer to the target question is the total cost = $0.32 x 14
Case b: Each call was 200 minutes long, for a total of 1400 minutes. At $0.32 per minute, the answer to the target question is the total cost = $0.32 x 1400
Since we cannot answer the target question with certainty, the combined statements are NOT SUFFICIENT

Answer: E

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