state gov BSSC Laboratory Assistant Mock Test Series 2025 Physics Units, Dimensions and Measurements Accuracy, precision of instruments and errors in measurement
If the measurement of two quantities as P = (4 m ± 0.1 m) and Q = (7 m ± 0.3 m) then the value of Q-P will be
1
(3 m ± 0.4 m)
2
(-3 m ± 0.2 m)
3
(3 m ± 0.1 m)
4
None