**Quote:**

Note that the median of a set with odd number of elements is just the middle element, when arranged in ascending/descending order.

(1) The median of set is 0. The median of this set of 5 (odd) elements must be the middle term, hence . Sufficient.

(2) The median of set is . It could be that (in this case the set is {-1, 0, 0, 1, 3}) as well as it could be that (in this case the set is {-2, -1, 1, 2, 3}). Not sufficient.

Answer: A.

Very clear, Thanks all.

I'm pretty slow with picking numbers for DS problems, especially statistics. In this case, is "2" a go to number for testing, or does this 'recognition' skill come with practice and/or knowledge?

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