What are systematic errors?
Repeat of measurement under same conditions yields reading with error of same magnitude and sign.
What are random errors?
Repeat of measurement under same conditions yields reading with error of different magnitude and sign.
What do you know by accuracy in an experiment?
It is measure of how close the result of an experiment comes to the true value.
What can you understand by precision of an experiment?
It is measure of how reproducible the results are.