Q.

The best method to reduce random errors is

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a

None of these

b

to repeat the experiment many times and to take the average results

c

to change the instrument used for measurement 

d

to take help of experienced observer

answer is C.

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Detailed Solution

The best way to reduce random errors is to increase the sample size, as the probability of a positive error and negative error is same.

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The best method to reduce random errors is