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20 Sep 2021, 01:30
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A
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Difficulty:
45%
(medium)
Question Stats:
55% (01:06) correct
45%
(01:02)
wrong
based on 252
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Pete works at three part-time jobs to make extra money. What are hisaverage earnings per hour?
(1) Pete earned $500 for 20 hours at the first job, $150 for 10 hours at the second job, and $100 for 5 hours at the third job.
(2) Pete earned an average of $25 per hour at the first job, $15 per hour at the second job, and $20 per hour at the third job.
(1) Pete earned $500 for 20 hours at the first job, $150 for 10 hours at the second job, and $100 for 5 hours at the third job.
(2) Pete earned an average of $25 per hour at the first job, $15 per hour at the second job, and $20 per hour at the third job.
20 Sep 2021, 08:02
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The answer is D.
If we look at (2), it is easy to get average salary for Pete: (25+15+20)/3= 20 - sufficient.
(1) basically gives as the same result if we divide money earned by a number of hours - sufficient.
If we look at (2), it is easy to get average salary for Pete: (25+15+20)/3= 20 - sufficient.
(1) basically gives as the same result if we divide money earned by a number of hours - sufficient.
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20 Sep 2021, 19:20
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Pete works at three part-time jobs to make extra money. What are his average earnings per hour?
(1) Pete earned $500 for 20 hours at the first job, $150 for 10 hours at the second job, and $100 for 5 hours at the third job.
=> average per hour = (500 + 150 + 100) / (20 + 10 + 5)
=> sufficient
(2) Pete earned an average of $25 per hour at the first job, $15 per hour at the second job, and $20 per hour at the third job.
=> average per hour = (25 + 15 + 20) / (1 + 1 + 1)
=> sufficient
IMO: D
(1) Pete earned $500 for 20 hours at the first job, $150 for 10 hours at the second job, and $100 for 5 hours at the third job.
=> average per hour = (500 + 150 + 100) / (20 + 10 + 5)
=> sufficient
(2) Pete earned an average of $25 per hour at the first job, $15 per hour at the second job, and $20 per hour at the third job.
=> average per hour = (25 + 15 + 20) / (1 + 1 + 1)
=> sufficient
IMO: D
