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If \( G_{1}, G_{2} \) are the geometric means of two series of observations and \( G \) is the GM of the ratios of the corresponding observations then \( G \) is equal to
(A) \( \frac{G_{1}}{G_{2}} \)
(B) \( \frac{\log G_{1}}{\log G_{2}} \)
(C) \( \log G_{1}-\log G_{2} \)
(D) \( \log \left(G_{1}, G_{2}\right) \)
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