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If the standard deviation of the numbers –1, 0, 1, k is √5 where k > 0, then k is equal to :

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If the standard deviation of the numbers –1, 0, 1, k is   √5 where k > 0, then k is equal to :

(1)  √6

(2)  2√(10/3)

(3)  4√(5/3)

(4)  2√6

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Correct option  (4)  2√6

Explanation:

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