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Three measurements of the time for 20 os...

Three measurements of the time for 20 oscillations of a pendulum give `t_1 = 39.6s, t_2 39.9s and t_3 = 39.5s . The precision in the measurement is

A

`0.1` sec

B

`0.01` sec

C

`1` sec

D

`2` sec

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The correct Answer is:
A
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