Two plants \( A \) and \( B \) of a factory show following results about the number of workers a...

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Two plants \( A \) and \( B \) of a factory show following results about the number of workers and the wages paid to them
\begin{tabular}{lll}
No. of workers & Plant A & Plant B \\
Average monthly wages & 5000 & 6000 \\
Variance of distribution of wages & 81 & ₹ 2500 \\
\hline
\end{tabular}
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