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Physics
If the random error in the average of 100 observations is x . Then, the random error in the average of 400 observations will be
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Q. If the random error in the average of $100$ observations is $x$ . Then, the random error in the average of $400$ observations will be
NTA Abhyas
NTA Abhyas 2020
A
$4x$
B
$\frac{1}{4}x$
C
$2x$
D
$\frac{x}{2}$
Solution:
When the number of observations is
made $n$ times, the random error
reduces to $\frac{1}{n}$ times.