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The numbers are 0.9, 0.5, 0.7, 0.4, 0.3, 0.2.

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To find the median, order the numbers from least to greatest.

0.2, 0.3, 0.4, 0.5, 0.7, 0.9.

There are even number of items.Find the mean of the two middle numbers

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In the given numbers does not appears more than one time.so, the mode is none. $\"\"$

The mean is 0.5, median is 0.45 and mode is none.