If the mean and the standard deviation of the data 3, 5, 7, a, b are 5 and 2 respectively, then a and b are the roots of the equation :

Question

If the mean and the standard deviation of the
data 3, 5, 7, a, b are 5 and 2 respectively, then a and b are the roots of the equation :

x² – 20x + 18 = 0

2x² – 20x + 19 = 0

x² – 10x + 18 = 0

x² – 10x + 19 = 0

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