Find the variance of the numbers k, k+1, k+2,
...Find the variance of the numbers k, k+1, k+2,
23
1
k + 1
(k + 1)2
Correct answer is A
mean (x) = ∑xN
= k + k + 1 + k + 3
= 3k+33
= k + 1
X(X−X)(X−X)2k−11k+100k+212
Variance (52) = ∑(x−x)2N
= 23
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