Two wires are weighed separately

PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

Two wires are weighed separately. The first mass is

12.48\,\text{g}

with an absolute uncertainty of

0.02\,\text{g}

, and the second is

7.3\,\text{g}

with an absolute uncertainty of

0.1\,\text{g}

. Calculate the combined mass with its absolute uncertainty and write the answer rounded to the correct number of decimal places.