1.

1). \(\frac{{10}}{{1000}}\)2). \(\frac{{100}}{{1900}}\)3). \(\frac{{10}}{{900}}\)4). \(\frac{{10}}{{800}}\)

Answer»

The pattern of the given series is as follows:

$(\begin{array}{l} \Rightarrow \frac{{50}}{{500}} = \frac{1}{{10}}\\ \Rightarrow \frac{{40}}{{1200}} = \frac{1}{{30}}\\ \Rightarrow \frac{{30}}{{1500}} = \frac{1}{{50}}\\ \Rightarrow \frac{{20}}{{1400}} = \frac{1}{{70}}\\ \Rightarrow \frac{{10}}{{900}} = \frac{1}{{90}} \end{array})$



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