One morning Emily recorded the time that it took to read each of her email messages. The times, in seconds, were 32, 18, 20, 29, and 21. How many seconds greater was the average (arithmetic mean) time than the median time?
A. 1
B. 1.5
C. 2.2
D. 2.5
E. 3
OA E
Source: GMAT Prep
One morning Emily recorded the time that it took to read each of her email messages. The times, in seconds,
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Solution:BTGmoderatorDC wrote: ↑Wed Nov 09, 2022 10:07 pmOne morning Emily recorded the time that it took to read each of her email messages. The times, in seconds, were 32, 18, 20, 29, and 21. How many seconds greater was the average (arithmetic mean) time than the median time?
A. 1
B. 1.5
C. 2.2
D. 2.5
E. 3
OA E
Source: GMAT Prep
The average is:
(32 +18 + 20 + 29 + 21)/5 = 120/5 = 24
The 5 values in order are: 18, 20, 21, 29, 32. Thus, the median is 21.
Therefore, the average is 24  21 = 3 seconds more than the median.
Answer: E
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