# Does the order of extraction in Urn Problem matter?

Lets assume that at an exam, students must pick their subject from a pile of envelopes. Some of the subjects are easy and some are hard. The students don't put the envelope back into the pile after picking. Do those who pick first have a better chance of picking a easy subject?

More lets assume that the students know how many subjects are easy and how many are hard.

This is fundamentally an "Urn problem" without replacement.