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Q.

Three students namely A,B,C have done an experiment two times individually for which the correct value is 2.00g The results are                         Experiment -1                  Experiment -2        Student A    1.95g                               1.93        Student B    1.94g                               2.05g        Student C     2.01g                               1.99gWhich of the above results are considered both accurate and precise?

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a

C

b

B

c

A

d

A & B

answer is A.

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Detailed Solution

Precision refers to the closeness  of measurements of the same physical quantity.  Accuracy is the agreement of the measured value with the truth.
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