measurement accuracy

A balanced Wheatsone bridge ABCD has the following arm resistances : R AB = 1 k$$\Omega$$ $$\pm$$ 2.1%; R BC = 100 $$\Omega$$ $$\pm$$ 0.5%; R CD is an unknown resistance; R DA = 30...

A variable $$'w'$$ is related to three other variables $$x, y, z$$ as $$w=xy/z.$$ The variables are measured with meters of accuracy$$ \pm $$ $$0.5$$% reading, $$ \pm 1\% $$ of ful...