The following data gives the distribution of height of students :
$\begin{array}{cccccccc}\underset{\left(\text{in cm}\right)}{\mathrm{Height}}& 160& 150& 152& 161& 156& 154& 155\\ \underset{\text{students}}{\text{Numbers of }}& 12& 8& 4& 4& 3& 3& 7\end{array}$
The median of the distribution is

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