Time periods of oscillation of the same simple pendulum measured using four different measuring clocks were…
Time periods of oscillation of the same simple pendulum measured using four different measuring clocks were recorded as $4.62 \mathrm{~s}, 4.632 \mathrm{~s}, 4.6 \mathrm{~s}$ and $4.64 \mathrm{~s}$. The arithmetic mean of these readings in correct significant figure is :
$5 \mathrm{~s}$
$4.623 \mathrm{~s}$
$4.6 \mathrm{~s}$
$4.62 \mathrm{~s}$
Solution
Sum of number by considering significant digi
$\text {sum }=4.6+4.6+4.6+4.6=18.4$
Arithmetic Mean $=\frac{\text { sum }}{4}=\frac{18.4}{4}=4.6$