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E
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Difficulty:
55%
(hard)
Question Stats:
65% (01:34) correct
35%
(01:34)
wrong
based on 142
sessions
History
Date
Time
Result
Not Attempted Yet
Riley was assigned a task to type a document. Was Riley's average (arithmetic mean) typing rate more than 80 words per minute during the task?
(1) Riley took less than 45 minutes to complete the task.
(2) The document contained less than 3,600 words.
(1) Riley took less than 45 minutes to complete the task.
(2) The document contained less than 3,600 words.
10 May 2025, 12:30
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Official Solution:
Riley was assigned a task to type a document. Was Riley's average (arithmetic mean) typing rate more than 80 words per minute during the task?
(1) Riley took less than 45 minutes to complete the task.
Clearly not sufficient.
(2) The document contained less than 3,600 words.
Clearly not sufficient.
(1)+(2) Together, we know that Riley typed fewer than 3,600 words in less than 45 minutes. This is not enough to determine whether the average rate was above 80 words per minute. For example, if Riley typed 3,000 words in 30 minutes, the rate would be 100 words per minute; if 300 words in 30 minutes, the rate would be 10 words per minute. Not sufficient.
Answer: E
Riley was assigned a task to type a document. Was Riley's average (arithmetic mean) typing rate more than 80 words per minute during the task?
(1) Riley took less than 45 minutes to complete the task.
Clearly not sufficient.
(2) The document contained less than 3,600 words.
Clearly not sufficient.
(1)+(2) Together, we know that Riley typed fewer than 3,600 words in less than 45 minutes. This is not enough to determine whether the average rate was above 80 words per minute. For example, if Riley typed 3,000 words in 30 minutes, the rate would be 100 words per minute; if 300 words in 30 minutes, the rate would be 10 words per minute. Not sufficient.
Answer: E
General Discussion
08 May 2025, 14:40
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Bunuel
We need the number of words and the time taken to find the average speed.
Statements (1) and (2) are clearly not sufficient as they provide only one of the two information needed. Let's evaluation combined
Let's assume that Riley took 1 minute to complete the task.
If the document had one word, her typing rate was less than 80 words per minute.
If the document had more than 80 words, her typing rate was more than 80 words per minute.
Hence, the statments combined is not sufficient as well.
Option E
