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If the mean and standard deviation of 5,...

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

A

`x^2-10x+18=0`

B

`x^2-20x+18=0`

C

`x^2-20x+19=0`

D

`x^2-10x+19=0`

Text Solution

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The correct Answer is:
D
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