As per the question,
18, 16, 18, 12, 10, 14, 16
Now arranging the data in the increasing order$$=10, 12, 14, 16, 16,18, 18$$
Total number of observations =7
Hence, the $$median =\dfrac{n}{2}+1$$
$$\Rightarrow median=4^{th} terms =16$$
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