Question

5. A student performs experiment with simple pendulum and
measures time for 10 vibrations. If he measures the time for
100 vibrations, the error in the measurement of time period
will be reduced by a factor of:
(a) 10
(b) 90
(c) 100
(d) 1000​

Answer 1

the error in the measurement of time period will be deduced by a factor of 10