Which measures of

Mean is defined as the average of the given observations.

Where a₁, a₂, a₃…a_n are data points, n being the number of data points. If a₁ and a_n are removed, the mean becomes,

Which is clearly different than the previously obtained mean.

If it so happens that either a1 or an is the most repeated in the data, then removing the data points also alters the mode.

But since median is the midpoint, removing the end points does not affect in any way. So the correct answer is Mean and Mode.