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E
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This was a question on an official practice test from GMAC for the Executive Assessment (this test pulls from an identical question bank as the GMAT). Below is the question. I answered C and was marked wrong. The system indicated that E is the right answer...could someone please help me understand why? Thank you so much for any direction you can provide.
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?
(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.
If two copying machines work simultaneously at their respective constant rates, how many copies do they produce in 5 minutes?
(1) One of the machines produces copies at the constant rate of 250 copies per minute.
(2) One of the machines produces copies at twice the constant rate of the other machine.
- A: Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
- B: Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
- C: BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
- D: EACH statement ALONE is sufficient.
- E: Statements (1) and (2) TOGETHER are NOT sufficient.
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01 Sep 2024, 17:53
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S1. Machine 1/2 (1 min = 250 copies). NOT SUFFICIENT
S2. Machine 1/2 (2 times rate of other machine). NOT SUFFICIENT
S1&S2 . If M1 = 1min - 250 copies, then M2 can be 125/500
NOT SUFFICIENT.
Hence E
I hope it helps
Posted from my mobile device
S2. Machine 1/2 (2 times rate of other machine). NOT SUFFICIENT
S1&S2 . If M1 = 1min - 250 copies, then M2 can be 125/500
NOT SUFFICIENT.
Hence E
I hope it helps
Posted from my mobile device
01 Sep 2024, 18:14
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Hm, but if you take both together... then rate of machine 1 is 250 copies / min. Then rate of machine two, which is twice that of machine one would be 500 copies per minute, right? so in 5 mins Machin 1 will produce 1250 copies, and machine 2 will produce 2500 copies... so we can get the total.
