a
\({\rm{(i)}}\,\,{\rm{\bar R}}\, = \frac{{{{\rm{R}}_{\rm{1}}}\, + {{\rm{R}}_{\rm{2}}}\, + {{\rm{R}}_{{\rm{3}}\,\,}} + {{\rm{R}}_{\rm{4}}}}}{{\rm{4}}}\)

\(\, = \,\,\frac{{{\rm{4}}{\rm{.12}} + {\rm{4}}{\rm{.08}} + {\rm{4}}{\rm{.22}} + {\rm{4}}{\rm{.14}}}}{{\rm{4}}}\,\, = \,\,\frac{{{\rm{16}}{\rm{.56}}}}{{\rm{4}}}\,\, = \,\,{\rm{4}}{\rm{.14}}\)

\({\rm{\Delta }}{{\rm{R}}_{\rm{1}}}\, = \,{\rm{4}}{\rm{.14}} - \,{\rm{4}}{\rm{.12}}\, = \,{\rm{0}}{\rm{.02,}}\)

\(\,{\rm{\Delta }}{{\rm{R}}_{\rm{2}}}\, = {\rm{4}}{\rm{.14}}\, - {\rm{4}}{\rm{.08}}\, = \,{\rm{0}}{\rm{.06,}}\,\)

\(\,{\rm{\Delta }}{{\rm{R}}_{\rm{3}}}\, = {\rm{4}}{\rm{.14}}\, - {\rm{4}}{\rm{.22}}\, = \,{\rm{0}}{\rm{.08,}}\,\)

\({\rm{\Delta }}{{\rm{R}}_{\rm{4}}} = \,{\rm{4}}{\rm{.14}}\, - \,{\rm{4}}{\rm{.14}}\, = \,{\rm{0}}{\rm{.00}}\)

\({\rm{\Delta \bar R}}\,\, = \,\frac{{{\rm{|}}\,{\rm{\Delta }}{{\rm{R}}_{\rm{1}}}\,{\rm{|}}\, + \,{\rm{|}}\,{\rm{\Delta }}{{\rm{R}}_{\rm{2}}}\,{\rm{|}}\, + \,{\rm{|}}\,{\rm{\Delta }}{{\rm{R}}_{\rm{3}}}\,{\rm{|}}\, + \,{\rm{|}}\,{\rm{\Delta }}{{\rm{R}}_{\rm{4}}}\,{\rm{|}}}}{{\rm{4}}}\,\,\,\)

\(\, = \,\,\frac{{{\rm{|}}\,\,{\rm{0}}{\rm{.02|}} + {\rm{|0}}{\rm{.06|}} + {\rm{|}}\, - \,{\rm{0}}{\rm{.08}}\,{\rm{|}}\, + \,{\rm{|}}\,{\rm{0}}{\rm{.00}}\,{\rm{|}}}}{{\rm{4}}}\)

\(\, = \,\frac{{{\rm{0}}{\rm{.16}}}}{{\rm{4}}}\,\,\, = \,\,{\rm{0}}{\rm{.04}}\)

નિરપેક્ષ ત્રુટિ \(\Delta \bar R\,\, = \,\,0.04\)

સાપેક્ષ ત્રુટિ \(\frac{{{\rm{\Delta \bar R}}}}{{{\rm{\bar R}}}}\, = \,\frac{{{\rm{0}}{\rm{.04}}}}{{{\rm{4}}{\rm{.14}}}}\,\,\, = \,{\rm{0}}{\rm{.00966}}\,\, = \,\,\,{\rm{0}}{\rm{.0096}}\)