Printing presses, Press A and Press B, are used to print the daily edi
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30 Dec 2023, 18:41
Printing presses, Press A and Press B, are used to print the daily edition of a certain newspaper. Working together at their individual constant rates, how many hours did it take the 2 presses to print the daily edition of the newspaper yesterday?
To answer the question of how many hours it took the two presses to print the daily edition, we need either information on the number of hours they took or information on their rates and how many newspapers they had to print to complete the job so that we can calculate the the number of hours they took using the equation Rate (newspapers/hour) x Time (hours) = Total (newspapers).
(1) Yesterday, Press A printed newspapers at a rate of 4,000 newspapers per hour.
This statement provides A's rate but tells us nothing about B's rate or the total number of newspapers they had to print to complete the job.
So, this statement doesn't provide enough information for us to determine how long the two presses took to complete the job.
Insufficient.
(2) Yesterday, Press B printed newspapers at 75% the rate that Press A printed.
This statement alone doesn't tell us A's rate, B's rate, or how many newspapers they had to print to complete the job.
Insufficient
Statements (1) and (2) combined
Combined, the statements give us A's rate and B's rate, which is 0.75 x 4000 = 3000 newspapers per hour, but they don't tell us how many newspapers the two printers had to print to complete the job. So, all we have is the Rate part of the equation, and we are left without information on the total or a way to calculate the time.
Insufficient
The correct answer is (E).