Question

A science student takes 100 observations in an experiment. Second time he takes 500 observations in the same experiment. By doing so the possible error becomes :

• A. 5 times
• B. 1/5 times
• C. unchanged
• D. none of these

Answer 1

Answer: (B)

1/5 times

Number of observations taken reduces the error in the measured quantities. More is the number of observations, lesser is the error. Since the stud ent takes 5 times more observations in the second time, this reduces the error by a factor of 5. So possible error becomes 1/5 times.