JAMB Mathematics 2013 Objective — Question 45
Question 45 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2013 Objective paper, with the correct answer and a full explanation.
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If variance of 3+x, 6, 4, x and 7−x is 4 and the mean is 5, find the standard deviation.
- A. A. 3
- B. B. 12
- C. C. 43
- D. D. 2Correct
Explanation
SD=√variance=√4=2.
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