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JEE MAIN 2025
07-04-2025 SHIFT-1
Question
The mean and standard deviation of 100 observations are 40 and 5.1, respectively. By mistake one observation is taken as 50 instead of 40. If the correct mean and the correct standard deviation are $\mu $ and $\sigma$ respectively, then $10(\mu +\sigma)$ is equal to
Select the correct option:
A
445
B
451
C
449
D
447
✓ Correct! Well done.
✗ Incorrect. Try again or view the solution.
Solution
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