Teaching OSSSC TGT Teachers Mock Test Series 2025 Mathematics Quadratic Equations

If the mean and S.D. of the data 3, 5, 7, a, b are 5 and 2 respectively, then a and b are the roots of the equation

1
x2 - 10x + 18 = 0
2
2x2 - 20x + 19 = 0
3
x2 - 10x + 19 = 0
4
x2 - 20x + 18 = 0
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