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JEE MAIN 2019
10-04-2019 S2
Question
If both the mean and the standard deviation of 50 observations $x_1, x_2, \ldots x_{50}$ are equal to 16 , then the mean of $\left(x_1-4\right)^2,\left(x_2-4\right)^2, \ldots\left(x_{50}-4\right)^2$ is :
Select the correct option:
A
380
B
480
C
400
D
525
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
Question Tags
JEE Main
Mathematics
Medium
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