1.Units, Dimensions and Measurement
medium

$100$ प्रेक्षणों के समान्तर माध्य में यादृच्छिक त्रुटि $(random\, error) x$ है, तो $400$ प्रेक्षणों के समान्तर माध्य में यादृच्छिक त्रुटि होगी

A

$4x$

B

$\frac{1}{4}x$

C

$2x$

D

$\frac{1}{2}x$

Solution

Random error in $100$ observations $=x$

Random error in $400$ obsrvation $= ?$

If observation is increased by '$n$' times then random error decreases by $\frac{1}{ n }$ times therefore random error $=\frac{x}{4}$

Hence, the answer is $\frac{x}{4}$.

Standard 11
Physics

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