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1 Answer
May 1, 2018

Median increases .

Explanation:

The numbers in increasing order are #1,2,3,4,6,6,9,9#

As we have #4# and #6# in the middle, median is #(4+6)/2=5#

If #9# is added numbers become #1,2,3,4,6,6,9,9,9#

and number in the middle is #6#

and hence median increases.