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Each of the 4 students in a certain class read several books during the past month. What was the standard deviation of the numbers of books read by the 4 students during the past month?
(1) The range of the number of books read by the 4 students during the past month was 0.
(2) One of the 4 students read 5 books during the past month.
Answer: A
Source: GMAT Prep
(1) The range of the number of books read by the 4 students during the past month was 0.
(2) One of the 4 students read 5 books during the past month.
Answer: A
Source: GMAT Prep
