Mathematics · Statistics
Let 9 = x1 < x2 < ... < x7 be in an Arithmetic Progression (A.P.) with a common difference d. If the standard deviation of x1, x2, ..., x7 is 4 and the mean is x̄, then x̄ + x6 is equal to:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 125
- 22(9 + 8√7)
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- 418(1 + 1√3)
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34
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