Mathematics · Statistics

If the mean and standard deviation of the data set {3, 5, 7, a, b} are 5 and 2 respectively, then a and b are the roots of which of the following equations?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1x2 - 20x + 18 = 0
2x2 - 10x + 19 = 0✓
32x2 - 20x + 19 = 0
4x2 - 10x + 18 = 0

Correct answer

x2 - 10x + 19 = 0

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If the mean and standard deviation of the data set {3, 5, 7, a, b} are 5 and 2 respectively, then a and b are the roots of which of the following equations?

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If the mean and standard deviation of the data set {3, 5, 7, a, b} are 5 and 2 respectively, then a and b are the roots of which of the following equations?

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