If mean and the standard deviation |Statistics|JEEMAIN 2020

JEE-MAIN 2020

05-09-2020 S2

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 :

Select the correct option:

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

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

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

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

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Mathematics

Easy

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