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03 Apr 2021, 02:00
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A
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
55%
(hard)
Question Stats:
70% (02:54) correct
30%
(03:00)
wrong
based on 142
sessions
History
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Not Attempted Yet
A software programmer does 20% of the work in 80% of the time, and 80% of the work in the remaining 20% of the time. If the code he writes is X lines long and he was given one month (30 days) to accomplish the task, then, assuming that the programmer works at a constant rate in each of the two stages, How many lines of code were written in the last two weeks, in terms of X?
A. 13x/15
B. 15x/15
C. 7x/15
D. 2x/30
E. 13x/30
A. 13x/15
B. 15x/15
C. 7x/15
D. 2x/30
E. 13x/30
10 Apr 2021, 01:00
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Bunuel
It's better to plug the numbers for this question let x=30 lines;
20% of the work in 80% of the time --> 0.2*30 lines=6 lines in the first 0.8*30 days=24 days and the remaining 24 lines in last 6 days;
Last 14 days = last 6 days (stage 2) + previous 8 days (part of stage 1): 24 lines in last 6 days + 1/3*6=2 lines in previous 8 days (as 8 is 1/3 of 24 days in stage 1) = 26 lines in the last 14 days, which is 26/30=13/15 part of the whole job.
Answer: A.
General Discussion
yashikaaggarwal
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03 Apr 2021, 23:23
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Let X lines be 30
So the programmer wrote 6 lines in 24 days. 1 line per day
And 24 lines in 6 days.
We have to know the lines he wrote in last two weeks = 14 days
Last 6 days + 8 from previous
24 lines + 2 lines (1/4day)
He wrote 26 lines in last 2 weeks.
Putting value of X in options.
A is the answer.
Posted from my mobile device
So the programmer wrote 6 lines in 24 days. 1 line per day
And 24 lines in 6 days.
We have to know the lines he wrote in last two weeks = 14 days
Last 6 days + 8 from previous
24 lines + 2 lines (1/4day)
He wrote 26 lines in last 2 weeks.
Putting value of X in options.
A is the answer.
Posted from my mobile device
