Probability

Do you mean "at least two minors" or "exactly two minors"?

There are 9c5 total combinations (9!/5!/(9-5)!) = 126
There are 5c5 combinations in which no minors get carded = 1
There are 5c4 x 4c1 combinations in which one minor gets carded = 20
There are 5c3 x 4c2 combinations in which two minors get carded = 60

So 81 times out of 126 at least two minors get away or 61%.
60 times out of 126 exactly two minors get away or 48%.