Question

Three successive measurements in an experiment gave value $10.9,11.4042$ and $11.42$ the correct way of reporting the average value is:

• A. $11.2080$
• B. $11.21$
• C. $11.2$
• D. $11$

Answer 1

The correct option is C $11.2$

$X_{av}=\frac{10.9+11.4042+11.42}{3}=11.2414$

It will be reported as $11.2$ in significant figures.