SajjadAhmad 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
Target question: What is the total cost to make 7 long distance telephone calls?When we SCAN the statements, we see the key phrase:
at leastThis 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 14Case 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 1400Since we cannot answer the
target question with certainty, the combined statements are NOT SUFFICIENT
Answer: E
Cheers,
Brent
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